diff --git a/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_buffers.c b/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_buffers.c new file mode 100644 index 000000000..aef911f3b --- /dev/null +++ b/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_buffers.c @@ -0,0 +1,478 @@ +/* + * V4L2 buffer helper functions. + * + * Copyright (C) 2017 Alexis Ballier + * Copyright (C) 2017 Jorge Ramirez + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include +#include +#include +#include +#include +#include "libavcodec/avcodec.h" +#include "libavcodec/internal.h" +#include "v4l2_context.h" +#include "v4l2_buffers.h" +#include "v4l2_m2m.h" + +#define USEC_PER_SEC 1000000 + +static inline V4L2m2mContext *buf_to_m2mctx(V4L2Buffer *buf) +{ + return V4L2_TYPE_IS_OUTPUT(buf->context->type) ? + container_of(buf->context, V4L2m2mContext, output) : + container_of(buf->context, V4L2m2mContext, capture); +} + +static inline AVCodecContext *logger(V4L2Buffer *buf) +{ + return buf_to_m2mctx(buf)->avctx; +} + +static inline void v4l2_set_pts(V4L2Buffer *out, int64_t pts) +{ + V4L2m2mContext *s = buf_to_m2mctx(out); + AVRational v4l2_timebase = { 1, USEC_PER_SEC }; + int64_t v4l2_pts; + + if (pts == AV_NOPTS_VALUE) + pts = 0; + + /* convert pts to v4l2 timebase */ + v4l2_pts = av_rescale_q(pts, s->avctx->time_base, v4l2_timebase); + out->buf.timestamp.tv_usec = v4l2_pts % USEC_PER_SEC; + out->buf.timestamp.tv_sec = v4l2_pts / USEC_PER_SEC; +} + +static inline uint64_t v4l2_get_pts(V4L2Buffer *avbuf) +{ + V4L2m2mContext *s = buf_to_m2mctx(avbuf); + AVRational v4l2_timebase = { 1, USEC_PER_SEC }; + int64_t v4l2_pts; + + /* convert pts back to encoder timebase */ + v4l2_pts = (int64_t)avbuf->buf.timestamp.tv_sec * USEC_PER_SEC + + avbuf->buf.timestamp.tv_usec; + + return av_rescale_q(v4l2_pts, v4l2_timebase, s->avctx->time_base); +} + +static enum AVColorPrimaries v4l2_get_color_primaries(V4L2Buffer *buf) +{ + enum v4l2_ycbcr_encoding ycbcr; + enum v4l2_colorspace cs; + + cs = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? + buf->context->format.fmt.pix_mp.colorspace : + buf->context->format.fmt.pix.colorspace; + + ycbcr = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? + buf->context->format.fmt.pix_mp.ycbcr_enc: + buf->context->format.fmt.pix.ycbcr_enc; + + switch(ycbcr) { + case V4L2_YCBCR_ENC_XV709: + case V4L2_YCBCR_ENC_709: return AVCOL_PRI_BT709; + case V4L2_YCBCR_ENC_XV601: + case V4L2_YCBCR_ENC_601:return AVCOL_PRI_BT470M; + default: + break; + } + + switch(cs) { + case V4L2_COLORSPACE_470_SYSTEM_BG: return AVCOL_PRI_BT470BG; + case V4L2_COLORSPACE_SMPTE170M: return AVCOL_PRI_SMPTE170M; + case V4L2_COLORSPACE_SMPTE240M: return AVCOL_PRI_SMPTE240M; + case V4L2_COLORSPACE_BT2020: return AVCOL_PRI_BT2020; + default: + break; + } + + return AVCOL_PRI_UNSPECIFIED; +} + +static enum AVColorRange v4l2_get_color_range(V4L2Buffer *buf) +{ + enum v4l2_quantization qt; + + qt = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? + buf->context->format.fmt.pix_mp.quantization : + buf->context->format.fmt.pix.quantization; + + switch (qt) { + case V4L2_QUANTIZATION_LIM_RANGE: return AVCOL_RANGE_MPEG; + case V4L2_QUANTIZATION_FULL_RANGE: return AVCOL_RANGE_JPEG; + default: + break; + } + + return AVCOL_RANGE_UNSPECIFIED; +} + +static enum AVColorSpace v4l2_get_color_space(V4L2Buffer *buf) +{ + enum v4l2_ycbcr_encoding ycbcr; + enum v4l2_colorspace cs; + + cs = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? + buf->context->format.fmt.pix_mp.colorspace : + buf->context->format.fmt.pix.colorspace; + + ycbcr = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? + buf->context->format.fmt.pix_mp.ycbcr_enc: + buf->context->format.fmt.pix.ycbcr_enc; + + switch(cs) { + case V4L2_COLORSPACE_SRGB: return AVCOL_SPC_RGB; + case V4L2_COLORSPACE_REC709: return AVCOL_SPC_BT709; + case V4L2_COLORSPACE_470_SYSTEM_M: return AVCOL_SPC_FCC; + case V4L2_COLORSPACE_470_SYSTEM_BG: return AVCOL_SPC_BT470BG; + case V4L2_COLORSPACE_SMPTE170M: return AVCOL_SPC_SMPTE170M; + case V4L2_COLORSPACE_SMPTE240M: return AVCOL_SPC_SMPTE240M; + case V4L2_COLORSPACE_BT2020: + if (ycbcr == V4L2_YCBCR_ENC_BT2020_CONST_LUM) + return AVCOL_SPC_BT2020_CL; + else + return AVCOL_SPC_BT2020_NCL; + default: + break; + } + + return AVCOL_SPC_UNSPECIFIED; +} + +static enum AVColorTransferCharacteristic v4l2_get_color_trc(V4L2Buffer *buf) +{ + enum v4l2_ycbcr_encoding ycbcr; + enum v4l2_xfer_func xfer; + enum v4l2_colorspace cs; + + cs = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? + buf->context->format.fmt.pix_mp.colorspace : + buf->context->format.fmt.pix.colorspace; + + ycbcr = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? + buf->context->format.fmt.pix_mp.ycbcr_enc: + buf->context->format.fmt.pix.ycbcr_enc; + + xfer = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? + buf->context->format.fmt.pix_mp.xfer_func: + buf->context->format.fmt.pix.xfer_func; + + switch (xfer) { + case V4L2_XFER_FUNC_709: return AVCOL_TRC_BT709; + case V4L2_XFER_FUNC_SRGB: return AVCOL_TRC_IEC61966_2_1; + default: + break; + } + + switch (cs) { + case V4L2_COLORSPACE_470_SYSTEM_M: return AVCOL_TRC_GAMMA22; + case V4L2_COLORSPACE_470_SYSTEM_BG: return AVCOL_TRC_GAMMA28; + case V4L2_COLORSPACE_SMPTE170M: return AVCOL_TRC_SMPTE170M; + case V4L2_COLORSPACE_SMPTE240M: return AVCOL_TRC_SMPTE240M; + default: + break; + } + + switch (ycbcr) { + case V4L2_YCBCR_ENC_XV709: + case V4L2_YCBCR_ENC_XV601: return AVCOL_TRC_BT1361_ECG; + default: + break; + } + + return AVCOL_TRC_UNSPECIFIED; +} + +static void v4l2_free_buffer(void *opaque, uint8_t *unused) +{ + V4L2Buffer* avbuf = opaque; + V4L2m2mContext *s = buf_to_m2mctx(avbuf); + + if (atomic_fetch_sub(&avbuf->context_refcount, 1) == 1) { + atomic_fetch_sub_explicit(&s->refcount, 1, memory_order_acq_rel); + + if (s->reinit) { + if (!atomic_load(&s->refcount)) + sem_post(&s->refsync); + } else { + if (s->draining) { + /* no need to queue more buffers to the driver */ + avbuf->status = V4L2BUF_AVAILABLE; + } + else if (avbuf->context->streamon) + ff_v4l2_buffer_enqueue(avbuf); + } + + av_buffer_unref(&avbuf->context_ref); + } +} + +static int v4l2_buf_to_bufref(V4L2Buffer *in, int plane, AVBufferRef **buf) +{ + V4L2m2mContext *s = buf_to_m2mctx(in); + + if (plane >= in->num_planes) + return AVERROR(EINVAL); + + /* even though most encoders return 0 in data_offset encoding vp8 does require this value */ + *buf = av_buffer_create((char *)in->plane_info[plane].mm_addr + in->planes[plane].data_offset, + in->plane_info[plane].length, v4l2_free_buffer, in, 0); + if (!*buf) + return AVERROR(ENOMEM); + + if (in->context_ref) + atomic_fetch_add(&in->context_refcount, 1); + else { + in->context_ref = av_buffer_ref(s->self_ref); + if (!in->context_ref) { + av_buffer_unref(buf); + return AVERROR(ENOMEM); + } + in->context_refcount = 1; + } + + in->status = V4L2BUF_RET_USER; + atomic_fetch_add_explicit(&s->refcount, 1, memory_order_relaxed); + + return 0; +} + +static int v4l2_bufref_to_buf(V4L2Buffer *out, int plane, const uint8_t* data, int size, AVBufferRef* bref) +{ + unsigned int bytesused, length; + + if (plane >= out->num_planes) + return AVERROR(EINVAL); + + bytesused = FFMIN(size, out->plane_info[plane].length); + length = out->plane_info[plane].length; + + memcpy(out->plane_info[plane].mm_addr, data, FFMIN(size, out->plane_info[plane].length)); + + if (V4L2_TYPE_IS_MULTIPLANAR(out->buf.type)) { + out->planes[plane].bytesused = bytesused; + out->planes[plane].length = length; + } else { + out->buf.bytesused = bytesused; + out->buf.length = length; + } + + return 0; +} + +/****************************************************************************** + * + * V4L2uffer interface + * + ******************************************************************************/ + +int ff_v4l2_buffer_avframe_to_buf(const AVFrame *frame, V4L2Buffer* out) +{ + int i, ret; + + for(i = 0; i < out->num_planes; i++) { + ret = v4l2_bufref_to_buf(out, i, frame->buf[i]->data, frame->buf[i]->size, frame->buf[i]); + if (ret) + return ret; + } + + v4l2_set_pts(out, frame->pts); + + return 0; +} + +int ff_v4l2_buffer_buf_to_avframe(AVFrame *frame, V4L2Buffer *avbuf) +{ + V4L2m2mContext *s = buf_to_m2mctx(avbuf); + int i, ret; + + av_frame_unref(frame); + + /* 1. get references to the actual data */ + for (i = 0; i < avbuf->num_planes; i++) { + ret = v4l2_buf_to_bufref(avbuf, i, &frame->buf[i]); + if (ret) + return ret; + + frame->linesize[i] = avbuf->plane_info[i].bytesperline; + frame->data[i] = frame->buf[i]->data; + } + + /* 1.1 fixup special cases */ + switch (avbuf->context->av_pix_fmt) { + case AV_PIX_FMT_NV12: + if (avbuf->num_planes > 1) + break; + frame->linesize[1] = avbuf->plane_info[0].bytesperline; + frame->data[1] = frame->buf[0]->data + avbuf->plane_info[0].bytesperline * avbuf->context->format.fmt.pix_mp.height; + break; + default: + break; + } + + /* 2. get frame information */ + frame->key_frame = !!(avbuf->buf.flags & V4L2_BUF_FLAG_KEYFRAME); + frame->format = avbuf->context->av_pix_fmt; + frame->color_primaries = v4l2_get_color_primaries(avbuf); + frame->colorspace = v4l2_get_color_space(avbuf); + frame->color_range = v4l2_get_color_range(avbuf); + frame->color_trc = v4l2_get_color_trc(avbuf); + frame->pts = v4l2_get_pts(avbuf); + + /* these two values are updated also during re-init in v4l2_process_driver_event */ + frame->height = s->output.height; + frame->width = s->output.width; + + /* 3. report errors upstream */ + if (avbuf->buf.flags & V4L2_BUF_FLAG_ERROR) { + av_log(logger(avbuf), AV_LOG_ERROR, "%s: driver decode error\n", avbuf->context->name); + frame->decode_error_flags |= FF_DECODE_ERROR_INVALID_BITSTREAM; + } + + return 0; +} + +int ff_v4l2_buffer_buf_to_avpkt(AVPacket *pkt, V4L2Buffer *avbuf) +{ + int ret; + + av_packet_unref(pkt); + ret = v4l2_buf_to_bufref(avbuf, 0, &pkt->buf); + if (ret) + return ret; + + pkt->size = V4L2_TYPE_IS_MULTIPLANAR(avbuf->buf.type) ? avbuf->buf.m.planes[0].bytesused : avbuf->buf.bytesused; + pkt->data = pkt->buf->data; + + if (avbuf->buf.flags & V4L2_BUF_FLAG_KEYFRAME) + pkt->flags |= AV_PKT_FLAG_KEY; + + if (avbuf->buf.flags & V4L2_BUF_FLAG_ERROR) { + av_log(logger(avbuf), AV_LOG_ERROR, "%s driver encode error\n", avbuf->context->name); + pkt->flags |= AV_PKT_FLAG_CORRUPT; + } + + pkt->dts = pkt->pts = v4l2_get_pts(avbuf); + + return 0; +} + +int ff_v4l2_buffer_avpkt_to_buf(const AVPacket *pkt, V4L2Buffer *out) +{ + int ret; + + ret = v4l2_bufref_to_buf(out, 0, pkt->data, pkt->size, pkt->buf); + if (ret) + return ret; + + v4l2_set_pts(out, pkt->pts); + + if (pkt->flags & AV_PKT_FLAG_KEY) + out->flags = V4L2_BUF_FLAG_KEYFRAME; + + return 0; +} + +int ff_v4l2_buffer_initialize(V4L2Buffer* avbuf, int index) +{ + V4L2Context *ctx = avbuf->context; + int ret, i; + + avbuf->buf.memory = V4L2_MEMORY_MMAP; + avbuf->buf.type = ctx->type; + avbuf->buf.index = index; + + if (V4L2_TYPE_IS_MULTIPLANAR(ctx->type)) { + avbuf->buf.length = VIDEO_MAX_PLANES; + avbuf->buf.m.planes = avbuf->planes; + } + + ret = ioctl(buf_to_m2mctx(avbuf)->fd, VIDIOC_QUERYBUF, &avbuf->buf); + if (ret < 0) + return AVERROR(errno); + + if (V4L2_TYPE_IS_MULTIPLANAR(ctx->type)) { + avbuf->num_planes = 0; + for (;;) { + /* in MP, the V4L2 API states that buf.length means num_planes */ + if (avbuf->num_planes >= avbuf->buf.length) + break; + if (avbuf->buf.m.planes[avbuf->num_planes].length) + avbuf->num_planes++; + } + } else + avbuf->num_planes = 1; + + for (i = 0; i < avbuf->num_planes; i++) { + + avbuf->plane_info[i].bytesperline = V4L2_TYPE_IS_MULTIPLANAR(ctx->type) ? + ctx->format.fmt.pix_mp.plane_fmt[i].bytesperline : + ctx->format.fmt.pix.bytesperline; + + if (V4L2_TYPE_IS_MULTIPLANAR(ctx->type)) { + avbuf->plane_info[i].length = avbuf->buf.m.planes[i].length; + avbuf->plane_info[i].mm_addr = mmap(NULL, avbuf->buf.m.planes[i].length, + PROT_READ | PROT_WRITE, MAP_SHARED, + buf_to_m2mctx(avbuf)->fd, avbuf->buf.m.planes[i].m.mem_offset); + } else { + avbuf->plane_info[i].length = avbuf->buf.length; + avbuf->plane_info[i].mm_addr = mmap(NULL, avbuf->buf.length, + PROT_READ | PROT_WRITE, MAP_SHARED, + buf_to_m2mctx(avbuf)->fd, avbuf->buf.m.offset); + } + + if (avbuf->plane_info[i].mm_addr == MAP_FAILED) + return AVERROR(ENOMEM); + } + + avbuf->status = V4L2BUF_AVAILABLE; + + if (V4L2_TYPE_IS_OUTPUT(ctx->type)) + return 0; + + if (V4L2_TYPE_IS_MULTIPLANAR(ctx->type)) { + avbuf->buf.m.planes = avbuf->planes; + avbuf->buf.length = avbuf->num_planes; + + } else { + avbuf->buf.bytesused = avbuf->planes[0].bytesused; + avbuf->buf.length = avbuf->planes[0].length; + } + + return ff_v4l2_buffer_enqueue(avbuf); +} + +int ff_v4l2_buffer_enqueue(V4L2Buffer* avbuf) +{ + int ret; + + avbuf->buf.flags = avbuf->flags; + + ret = ioctl(buf_to_m2mctx(avbuf)->fd, VIDIOC_QBUF, &avbuf->buf); + if (ret < 0) + return AVERROR(errno); + + avbuf->status = V4L2BUF_IN_DRIVER; + + return 0; +} diff --git a/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_buffers.h b/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_buffers.h new file mode 100644 index 000000000..7a57caf94 --- /dev/null +++ b/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_buffers.h @@ -0,0 +1,131 @@ +/* + * V4L2 buffer helper functions. + * + * Copyright (C) 2017 Alexis Ballier + * Copyright (C) 2017 Jorge Ramirez + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef AVCODEC_V4L2_BUFFERS_H +#define AVCODEC_V4L2_BUFFERS_H + +#include +#include + +#include "avcodec.h" + +enum V4L2Buffer_status { + V4L2BUF_AVAILABLE, + V4L2BUF_IN_DRIVER, + V4L2BUF_RET_USER, +}; + +/** + * V4L2Buffer (wrapper for v4l2_buffer management) + */ +typedef struct V4L2Buffer { + /* each buffer needs to have a reference to its context */ + struct V4L2Context *context; + + /* This object is refcounted per-plane, so we need to keep track + * of how many context-refs we are holding. */ + AVBufferRef *context_ref; + atomic_uint context_refcount; + + /* keep track of the mmap address and mmap length */ + struct V4L2Plane_info { + int bytesperline; + void * mm_addr; + size_t length; + } plane_info[VIDEO_MAX_PLANES]; + + int num_planes; + + /* the v4l2_buffer buf.m.planes pointer uses the planes[] mem */ + struct v4l2_buffer buf; + struct v4l2_plane planes[VIDEO_MAX_PLANES]; + + int flags; + enum V4L2Buffer_status status; + +} V4L2Buffer; + +/** + * Extracts the data from a V4L2Buffer to an AVFrame + * + * @param[in] frame The AVFRame to push the information to + * @param[in] buf The V4L2Buffer to get the information from + * + * @returns 0 in case of success, AVERROR(EINVAL) if the number of planes is incorrect, + * AVERROR(ENOMEM) if the AVBufferRef can't be created. + */ +int ff_v4l2_buffer_buf_to_avframe(AVFrame *frame, V4L2Buffer *buf); + +/** + * Extracts the data from a V4L2Buffer to an AVPacket + * + * @param[in] pkt The AVPacket to push the information to + * @param[in] buf The V4L2Buffer to get the information from + * + * @returns 0 in case of success, AVERROR(EINVAL) if the number of planes is incorrect, + * AVERROR(ENOMEM) if the AVBufferRef can't be created. + * + */ +int ff_v4l2_buffer_buf_to_avpkt(AVPacket *pkt, V4L2Buffer *buf); + +/** + * Extracts the data from an AVPacket to a V4L2Buffer + * + * @param[in] frame AVPacket to get the data from + * @param[in] avbuf V4L2Bfuffer to push the information to + * + * @returns 0 in case of success, a negative AVERROR code otherwise + */ +int ff_v4l2_buffer_avpkt_to_buf(const AVPacket *pkt, V4L2Buffer *out); + +/** + * Extracts the data from an AVFrame to a V4L2Buffer + * + * @param[in] frame AVFrame to get the data from + * @param[in] avbuf V4L2Bfuffer to push the information to + * + * @returns 0 in case of success, a negative AVERROR code otherwise + */ +int ff_v4l2_buffer_avframe_to_buf(const AVFrame *frame, V4L2Buffer* out); + +/** + * Initializes a V4L2Buffer + * + * @param[in] avbuf V4L2Bfuffer to initialize + * @param[in] index v4l2 buffer id + * + * @returns 0 in case of success, a negative AVERROR code otherwise + */ +int ff_v4l2_buffer_initialize(V4L2Buffer* avbuf, int index); + +/** + * Enqueues a V4L2Buffer + * + * @param[in] avbuf V4L2Bfuffer to push to the driver + * + * @returns 0 in case of success, a negative AVERROR code otherwise + */ +int ff_v4l2_buffer_enqueue(V4L2Buffer* avbuf); + + +#endif // AVCODEC_V4L2_BUFFERS_H diff --git a/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_context.c b/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_context.c new file mode 100644 index 000000000..efcb0426e --- /dev/null +++ b/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_context.c @@ -0,0 +1,710 @@ +/* + * V4L2 context helper functions. + * + * Copyright (C) 2017 Alexis Ballier + * Copyright (C) 2017 Jorge Ramirez + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include +#include +#include +#include +#include +#include "libavcodec/avcodec.h" +#include "libavcodec/internal.h" +#include "v4l2_buffers.h" +#include "v4l2_fmt.h" +#include "v4l2_m2m.h" + +struct v4l2_format_update { + uint32_t v4l2_fmt; + int update_v4l2; + + enum AVPixelFormat av_fmt; + int update_avfmt; +}; + +static inline V4L2m2mContext *ctx_to_m2mctx(V4L2Context *ctx) +{ + return V4L2_TYPE_IS_OUTPUT(ctx->type) ? + container_of(ctx, V4L2m2mContext, output) : + container_of(ctx, V4L2m2mContext, capture); +} + +static inline AVCodecContext *logger(V4L2Context *ctx) +{ + return ctx_to_m2mctx(ctx)->avctx; +} + +static inline unsigned int v4l2_get_width(struct v4l2_format *fmt) +{ + return V4L2_TYPE_IS_MULTIPLANAR(fmt->type) ? fmt->fmt.pix_mp.width : fmt->fmt.pix.width; +} + +static inline unsigned int v4l2_get_height(struct v4l2_format *fmt) +{ + return V4L2_TYPE_IS_MULTIPLANAR(fmt->type) ? fmt->fmt.pix_mp.height : fmt->fmt.pix.height; +} + +static inline unsigned int v4l2_resolution_changed(V4L2Context *ctx, struct v4l2_format *fmt2) +{ + struct v4l2_format *fmt1 = &ctx->format; + int ret = V4L2_TYPE_IS_MULTIPLANAR(ctx->type) ? + fmt1->fmt.pix_mp.width != fmt2->fmt.pix_mp.width || + fmt1->fmt.pix_mp.height != fmt2->fmt.pix_mp.height + : + fmt1->fmt.pix.width != fmt2->fmt.pix.width || + fmt1->fmt.pix.height != fmt2->fmt.pix.height; + + if (ret) + av_log(logger(ctx), AV_LOG_DEBUG, "%s changed (%dx%d) -> (%dx%d)\n", + ctx->name, + v4l2_get_width(fmt1), v4l2_get_height(fmt1), + v4l2_get_width(fmt2), v4l2_get_height(fmt2)); + + return ret; +} + +static inline int v4l2_type_supported(V4L2Context *ctx) +{ + return ctx->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE || + ctx->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE || + ctx->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || + ctx->type == V4L2_BUF_TYPE_VIDEO_OUTPUT; +} + +static inline int v4l2_get_framesize_compressed(V4L2Context* ctx, int width, int height) +{ + V4L2m2mContext *s = ctx_to_m2mctx(ctx); + const int SZ_4K = 0x1000; + int size; + + if (av_codec_is_decoder(s->avctx->codec)) + return ((width * height * 3 / 2) / 2) + 128; + + /* encoder */ + size = FFALIGN(height, 32) * FFALIGN(width, 32) * 3 / 2 / 2; + return FFALIGN(size, SZ_4K); +} + +static inline void v4l2_save_to_context(V4L2Context* ctx, struct v4l2_format_update *fmt) +{ + ctx->format.type = ctx->type; + + if (fmt->update_avfmt) + ctx->av_pix_fmt = fmt->av_fmt; + + if (V4L2_TYPE_IS_MULTIPLANAR(ctx->type)) { + /* update the sizes to handle the reconfiguration of the capture stream at runtime */ + ctx->format.fmt.pix_mp.height = ctx->height; + ctx->format.fmt.pix_mp.width = ctx->width; + if (fmt->update_v4l2) { + ctx->format.fmt.pix_mp.pixelformat = fmt->v4l2_fmt; + + /* s5p-mfc requires the user to specify a buffer size */ + ctx->format.fmt.pix_mp.plane_fmt[0].sizeimage = + v4l2_get_framesize_compressed(ctx, ctx->width, ctx->height); + } + } else { + ctx->format.fmt.pix.height = ctx->height; + ctx->format.fmt.pix.width = ctx->width; + if (fmt->update_v4l2) { + ctx->format.fmt.pix.pixelformat = fmt->v4l2_fmt; + + /* s5p-mfc requires the user to specify a buffer size */ + ctx->format.fmt.pix.sizeimage = + v4l2_get_framesize_compressed(ctx, ctx->width, ctx->height); + } + } +} + +/** + * returns 1 if reinit was successful, negative if it failed + * returns 0 if reinit was not executed + */ +static int v4l2_handle_event(V4L2Context *ctx) +{ + V4L2m2mContext *s = ctx_to_m2mctx(ctx); + struct v4l2_format cap_fmt = s->capture.format; + struct v4l2_format out_fmt = s->output.format; + struct v4l2_event evt = { 0 }; + int full_reinit, reinit, ret; + + ret = ioctl(s->fd, VIDIOC_DQEVENT, &evt); + if (ret < 0) { + av_log(logger(ctx), AV_LOG_ERROR, "%s VIDIOC_DQEVENT\n", ctx->name); + return 0; + } + + if (evt.type != V4L2_EVENT_SOURCE_CHANGE) + return 0; + + ret = ioctl(s->fd, VIDIOC_G_FMT, &out_fmt); + if (ret) { + av_log(logger(ctx), AV_LOG_ERROR, "%s VIDIOC_G_FMT\n", s->output.name); + return 0; + } + + ret = ioctl(s->fd, VIDIOC_G_FMT, &cap_fmt); + if (ret) { + av_log(logger(ctx), AV_LOG_ERROR, "%s VIDIOC_G_FMT\n", s->capture.name); + return 0; + } + + full_reinit = v4l2_resolution_changed(&s->output, &out_fmt); + if (full_reinit) { + s->output.height = v4l2_get_height(&out_fmt); + s->output.width = v4l2_get_width(&out_fmt); + } + + reinit = v4l2_resolution_changed(&s->capture, &cap_fmt); + if (reinit) { + s->capture.height = v4l2_get_height(&cap_fmt); + s->capture.width = v4l2_get_width(&cap_fmt); + } + + if (full_reinit || reinit) + s->reinit = 1; + + if (full_reinit) { + ret = ff_v4l2_m2m_codec_full_reinit(s); + if (ret) { + av_log(logger(ctx), AV_LOG_ERROR, "v4l2_m2m_codec_full_reinit\n"); + return -EINVAL; + } + goto reinit_run; + } + + if (reinit) { + ret = ff_set_dimensions(s->avctx, s->capture.width, s->capture.height); + if (ret < 0) + av_log(logger(ctx), AV_LOG_WARNING, "update avcodec height and width\n"); + + ret = ff_v4l2_m2m_codec_reinit(s); + if (ret) { + av_log(logger(ctx), AV_LOG_ERROR, "v4l2_m2m_codec_reinit\n"); + return -EINVAL; + } + goto reinit_run; + } + + /* dummy event received */ + return 0; + + /* reinit executed */ +reinit_run: + return 1; +} + +static int v4l2_stop_decode(V4L2Context *ctx) +{ + struct v4l2_decoder_cmd cmd = { + .cmd = V4L2_DEC_CMD_STOP, + .flags = 0, + }; + int ret; + + ret = ioctl(ctx_to_m2mctx(ctx)->fd, VIDIOC_DECODER_CMD, &cmd); + if (ret) { + /* DECODER_CMD is optional */ + if (errno == ENOTTY) + return ff_v4l2_context_set_status(ctx, VIDIOC_STREAMOFF); + } + + return 0; +} + +static int v4l2_stop_encode(V4L2Context *ctx) +{ + struct v4l2_encoder_cmd cmd = { + .cmd = V4L2_ENC_CMD_STOP, + .flags = 0, + }; + int ret; + + ret = ioctl(ctx_to_m2mctx(ctx)->fd, VIDIOC_ENCODER_CMD, &cmd); + if (ret) { + /* ENCODER_CMD is optional */ + if (errno == ENOTTY) + return ff_v4l2_context_set_status(ctx, VIDIOC_STREAMOFF); + } + + return 0; +} + +static V4L2Buffer* v4l2_dequeue_v4l2buf(V4L2Context *ctx, int timeout) +{ + struct v4l2_plane planes[VIDEO_MAX_PLANES]; + struct v4l2_buffer buf = { 0 }; + V4L2Buffer* avbuf = NULL; + struct pollfd pfd = { + .events = POLLIN | POLLRDNORM | POLLPRI | POLLOUT | POLLWRNORM, /* default blocking capture */ + .fd = ctx_to_m2mctx(ctx)->fd, + }; + int i, ret; + + /* if we are draining and there are no more capture buffers queued in the driver we are done */ + if (!V4L2_TYPE_IS_OUTPUT(ctx->type) && ctx_to_m2mctx(ctx)->draining) { + for (i = 0; i < ctx->num_buffers; i++) { + if (ctx->buffers[i].status == V4L2BUF_IN_DRIVER) + goto start; + } + ctx->done = 1; + return NULL; + } + +start: + if (V4L2_TYPE_IS_OUTPUT(ctx->type)) + pfd.events = POLLOUT | POLLWRNORM; + else { + /* no need to listen to requests for more input while draining */ + if (ctx_to_m2mctx(ctx)->draining) + pfd.events = POLLIN | POLLRDNORM | POLLPRI; + } + + for (;;) { + ret = poll(&pfd, 1, timeout); + if (ret > 0) + break; + if (errno == EINTR) + continue; + return NULL; + } + + /* 0. handle errors */ + if (pfd.revents & POLLERR) { + /* if we are trying to get free buffers but none have been queued yet + no need to raise a warning */ + if (timeout == 0) { + for (i = 0; i < ctx->num_buffers; i++) { + if (ctx->buffers[i].status != V4L2BUF_AVAILABLE) + av_log(logger(ctx), AV_LOG_WARNING, "%s POLLERR\n", ctx->name); + } + } + else + av_log(logger(ctx), AV_LOG_WARNING, "%s POLLERR\n", ctx->name); + + return NULL; + } + + /* 1. handle resolution changes */ + if (pfd.revents & POLLPRI) { + ret = v4l2_handle_event(ctx); + if (ret < 0) { + /* if re-init failed, abort */ + ctx->done = 1; + return NULL; + } + if (ret) { + /* if re-init was successful drop the buffer (if there was one) + * since we had to reconfigure capture (unmap all buffers) + */ + return NULL; + } + } + + /* 2. dequeue the buffer */ + if (pfd.revents & (POLLIN | POLLRDNORM | POLLOUT | POLLWRNORM)) { + + if (!V4L2_TYPE_IS_OUTPUT(ctx->type)) { + /* there is a capture buffer ready */ + if (pfd.revents & (POLLIN | POLLRDNORM)) + goto dequeue; + + /* the driver is ready to accept more input; instead of waiting for the capture + * buffer to complete we return NULL so input can proceed (we are single threaded) + */ + if (pfd.revents & (POLLOUT | POLLWRNORM)) + return NULL; + } + +dequeue: + memset(&buf, 0, sizeof(buf)); + buf.memory = V4L2_MEMORY_MMAP; + buf.type = ctx->type; + if (V4L2_TYPE_IS_MULTIPLANAR(ctx->type)) { + memset(planes, 0, sizeof(planes)); + buf.length = VIDEO_MAX_PLANES; + buf.m.planes = planes; + } + + ret = ioctl(ctx_to_m2mctx(ctx)->fd, VIDIOC_DQBUF, &buf); + if (ret) { + if (errno != EAGAIN) { + ctx->done = 1; + if (errno != EPIPE) + av_log(logger(ctx), AV_LOG_DEBUG, "%s VIDIOC_DQBUF, errno (%s)\n", + ctx->name, av_err2str(AVERROR(errno))); + } + return NULL; + } + + avbuf = &ctx->buffers[buf.index]; + avbuf->status = V4L2BUF_AVAILABLE; + avbuf->buf = buf; + if (V4L2_TYPE_IS_MULTIPLANAR(ctx->type)) { + memcpy(avbuf->planes, planes, sizeof(planes)); + avbuf->buf.m.planes = avbuf->planes; + } + return avbuf; + } + + return NULL; +} + +static V4L2Buffer* v4l2_getfree_v4l2buf(V4L2Context *ctx) +{ + int timeout = 0; /* return when no more buffers to dequeue */ + int i; + + /* get back as many output buffers as possible */ + if (V4L2_TYPE_IS_OUTPUT(ctx->type)) { + do { + } while (v4l2_dequeue_v4l2buf(ctx, timeout)); + } + + for (i = 0; i < ctx->num_buffers; i++) { + if (ctx->buffers[i].status == V4L2BUF_AVAILABLE) + return &ctx->buffers[i]; + } + + return NULL; +} + +static int v4l2_release_buffers(V4L2Context* ctx) +{ + struct v4l2_requestbuffers req = { + .memory = V4L2_MEMORY_MMAP, + .type = ctx->type, + .count = 0, /* 0 -> unmaps buffers from the driver */ + }; + int i, j; + + for (i = 0; i < ctx->num_buffers; i++) { + V4L2Buffer *buffer = &ctx->buffers[i]; + + for (j = 0; j < buffer->num_planes; j++) { + struct V4L2Plane_info *p = &buffer->plane_info[j]; + if (p->mm_addr && p->length) + if (munmap(p->mm_addr, p->length) < 0) + av_log(logger(ctx), AV_LOG_ERROR, "%s unmap plane (%s))\n", ctx->name, av_err2str(AVERROR(errno))); + } + } + + return ioctl(ctx_to_m2mctx(ctx)->fd, VIDIOC_REQBUFS, &req); +} + +static inline int v4l2_try_raw_format(V4L2Context* ctx, enum AVPixelFormat pixfmt) +{ + struct v4l2_format *fmt = &ctx->format; + uint32_t v4l2_fmt; + int ret; + + v4l2_fmt = ff_v4l2_format_avfmt_to_v4l2(pixfmt); + if (!v4l2_fmt) + return AVERROR(EINVAL); + + if (V4L2_TYPE_IS_MULTIPLANAR(ctx->type)) + fmt->fmt.pix_mp.pixelformat = v4l2_fmt; + else + fmt->fmt.pix.pixelformat = v4l2_fmt; + + fmt->type = ctx->type; + + ret = ioctl(ctx_to_m2mctx(ctx)->fd, VIDIOC_TRY_FMT, fmt); + if (ret) + return AVERROR(EINVAL); + + return 0; +} + +static int v4l2_get_raw_format(V4L2Context* ctx, enum AVPixelFormat *p) +{ + enum AVPixelFormat pixfmt = ctx->av_pix_fmt; + struct v4l2_fmtdesc fdesc; + int ret; + + memset(&fdesc, 0, sizeof(fdesc)); + fdesc.type = ctx->type; + + if (pixfmt != AV_PIX_FMT_NONE) { + ret = v4l2_try_raw_format(ctx, pixfmt); + if (!ret) + return 0; + } + + for (;;) { + ret = ioctl(ctx_to_m2mctx(ctx)->fd, VIDIOC_ENUM_FMT, &fdesc); + if (ret) + return AVERROR(EINVAL); + + pixfmt = ff_v4l2_format_v4l2_to_avfmt(fdesc.pixelformat, AV_CODEC_ID_RAWVIDEO); + ret = v4l2_try_raw_format(ctx, pixfmt); + if (ret){ + fdesc.index++; + continue; + } + + *p = pixfmt; + + return 0; + } + + return AVERROR(EINVAL); +} + +static int v4l2_get_coded_format(V4L2Context* ctx, uint32_t *p) +{ + struct v4l2_fmtdesc fdesc; + uint32_t v4l2_fmt; + int ret; + + /* translate to a valid v4l2 format */ + v4l2_fmt = ff_v4l2_format_avcodec_to_v4l2(ctx->av_codec_id); + if (!v4l2_fmt) + return AVERROR(EINVAL); + + /* check if the driver supports this format */ + memset(&fdesc, 0, sizeof(fdesc)); + fdesc.type = ctx->type; + + for (;;) { + ret = ioctl(ctx_to_m2mctx(ctx)->fd, VIDIOC_ENUM_FMT, &fdesc); + if (ret) + return AVERROR(EINVAL); + + if (fdesc.pixelformat == v4l2_fmt) + break; + + fdesc.index++; + } + + *p = v4l2_fmt; + + return 0; +} + + /***************************************************************************** + * + * V4L2 Context Interface + * + *****************************************************************************/ + +int ff_v4l2_context_set_status(V4L2Context* ctx, uint32_t cmd) +{ + int type = ctx->type; + int ret; + + ret = ioctl(ctx_to_m2mctx(ctx)->fd, cmd, &type); + if (ret < 0) + return AVERROR(errno); + + ctx->streamon = (cmd == VIDIOC_STREAMON); + + return 0; +} + +int ff_v4l2_context_enqueue_frame(V4L2Context* ctx, const AVFrame* frame) +{ + V4L2m2mContext *s = ctx_to_m2mctx(ctx); + V4L2Buffer* avbuf; + int ret; + + if (!frame) { + ret = v4l2_stop_encode(ctx); + if (ret) + av_log(logger(ctx), AV_LOG_ERROR, "%s stop_encode\n", ctx->name); + s->draining= 1; + return 0; + } + + avbuf = v4l2_getfree_v4l2buf(ctx); + if (!avbuf) + return AVERROR(ENOMEM); + + ret = ff_v4l2_buffer_avframe_to_buf(frame, avbuf); + if (ret) + return ret; + + return ff_v4l2_buffer_enqueue(avbuf); +} + +int ff_v4l2_context_enqueue_packet(V4L2Context* ctx, const AVPacket* pkt) +{ + V4L2m2mContext *s = ctx_to_m2mctx(ctx); + V4L2Buffer* avbuf; + int ret; + + if (!pkt->size) { + ret = v4l2_stop_decode(ctx); + if (ret) + av_log(logger(ctx), AV_LOG_ERROR, "%s stop_decode\n", ctx->name); + s->draining = 1; + return 0; + } + + avbuf = v4l2_getfree_v4l2buf(ctx); + if (!avbuf) + return AVERROR(ENOMEM); + + ret = ff_v4l2_buffer_avpkt_to_buf(pkt, avbuf); + if (ret) + return ret; + + return ff_v4l2_buffer_enqueue(avbuf); +} + +int ff_v4l2_context_dequeue_frame(V4L2Context* ctx, AVFrame* frame) +{ + V4L2Buffer* avbuf = NULL; + + /* + * blocks until: + * 1. decoded frame available + * 2. an input buffer is ready to be dequeued + */ + avbuf = v4l2_dequeue_v4l2buf(ctx, -1); + if (!avbuf) { + if (ctx->done) + return AVERROR_EOF; + + return AVERROR(EAGAIN); + } + + return ff_v4l2_buffer_buf_to_avframe(frame, avbuf); +} + +int ff_v4l2_context_dequeue_packet(V4L2Context* ctx, AVPacket* pkt) +{ + V4L2Buffer* avbuf = NULL; + + /* + * blocks until: + * 1. encoded packet available + * 2. an input buffer ready to be dequeued + */ + avbuf = v4l2_dequeue_v4l2buf(ctx, -1); + if (!avbuf) { + if (ctx->done) + return AVERROR_EOF; + + return AVERROR(EAGAIN); + } + + return ff_v4l2_buffer_buf_to_avpkt(pkt, avbuf); +} + +int ff_v4l2_context_get_format(V4L2Context* ctx) +{ + struct v4l2_format_update fmt = { 0 }; + int ret; + + if (ctx->av_codec_id == AV_CODEC_ID_RAWVIDEO) { + ret = v4l2_get_raw_format(ctx, &fmt.av_fmt); + if (ret) + return ret; + + fmt.update_avfmt = 1; + v4l2_save_to_context(ctx, &fmt); + + /* format has been tried already */ + return ret; + } + + ret = v4l2_get_coded_format(ctx, &fmt.v4l2_fmt); + if (ret) + return ret; + + fmt.update_v4l2 = 1; + v4l2_save_to_context(ctx, &fmt); + + return ioctl(ctx_to_m2mctx(ctx)->fd, VIDIOC_TRY_FMT, &ctx->format); +} + +int ff_v4l2_context_set_format(V4L2Context* ctx) +{ + return ioctl(ctx_to_m2mctx(ctx)->fd, VIDIOC_S_FMT, &ctx->format); +} + +void ff_v4l2_context_release(V4L2Context* ctx) +{ + int ret; + + if (!ctx->buffers) + return; + + ret = v4l2_release_buffers(ctx); + if (ret) + av_log(logger(ctx), AV_LOG_WARNING, "V4L2 failed to unmap the %s buffers\n", ctx->name); + + av_free(ctx->buffers); + ctx->buffers = NULL; +} + +int ff_v4l2_context_init(V4L2Context* ctx) +{ + V4L2m2mContext *s = ctx_to_m2mctx(ctx); + struct v4l2_requestbuffers req; + int ret, i; + + if (!v4l2_type_supported(ctx)) { + av_log(logger(ctx), AV_LOG_ERROR, "type %i not supported\n", ctx->type); + return AVERROR_PATCHWELCOME; + } + + ret = ioctl(s->fd, VIDIOC_G_FMT, &ctx->format); + if (ret) + av_log(logger(ctx), AV_LOG_ERROR, "%s VIDIOC_G_FMT failed\n", ctx->name); + + memset(&req, 0, sizeof(req)); + req.count = ctx->num_buffers; + req.memory = V4L2_MEMORY_MMAP; + req.type = ctx->type; + ret = ioctl(s->fd, VIDIOC_REQBUFS, &req); + if (ret < 0) + return AVERROR(errno); + + ctx->num_buffers = req.count; + ctx->buffers = av_mallocz(ctx->num_buffers * sizeof(V4L2Buffer)); + if (!ctx->buffers) { + av_log(logger(ctx), AV_LOG_ERROR, "%s malloc enomem\n", ctx->name); + return AVERROR(ENOMEM); + } + + for (i = 0; i < req.count; i++) { + ctx->buffers[i].context = ctx; + ret = ff_v4l2_buffer_initialize(&ctx->buffers[i], i); + if (ret < 0) { + av_log(logger(ctx), AV_LOG_ERROR, "%s buffer initialization (%s)\n", ctx->name, av_err2str(ret)); + av_free(ctx->buffers); + return ret; + } + } + + av_log(logger(ctx), AV_LOG_DEBUG, "%s: %s %02d buffers initialized: %04ux%04u, sizeimage %08u, bytesperline %08u\n", ctx->name, + V4L2_TYPE_IS_MULTIPLANAR(ctx->type) ? av_fourcc2str(ctx->format.fmt.pix_mp.pixelformat) : av_fourcc2str(ctx->format.fmt.pix.pixelformat), + req.count, + v4l2_get_width(&ctx->format), + v4l2_get_height(&ctx->format), + V4L2_TYPE_IS_MULTIPLANAR(ctx->type) ? ctx->format.fmt.pix_mp.plane_fmt[0].sizeimage : ctx->format.fmt.pix.sizeimage, + V4L2_TYPE_IS_MULTIPLANAR(ctx->type) ? ctx->format.fmt.pix_mp.plane_fmt[0].bytesperline : ctx->format.fmt.pix.bytesperline); + + return 0; +} diff --git a/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_context.h b/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_context.h new file mode 100644 index 000000000..632f1d0aa --- /dev/null +++ b/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_context.h @@ -0,0 +1,183 @@ +/* + * V4L2 context helper functions. + * + * Copyright (C) 2017 Alexis Ballier + * Copyright (C) 2017 Jorge Ramirez + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef AVCODEC_V4L2_CONTEXT_H +#define AVCODEC_V4L2_CONTEXT_H + +#include +#include + +#include "libavcodec/avcodec.h" +#include "libavutil/pixfmt.h" +#include "libavutil/frame.h" +#include "libavutil/buffer.h" +#include "v4l2_buffers.h" + +typedef struct V4L2Context { + /** + * context name. + */ + const char* name; + + /** + * Type of this buffer context. + * See V4L2_BUF_TYPE_VIDEO_* in videodev2.h + * Readonly after init. + */ + enum v4l2_buf_type type; + + /** + * AVPixelFormat corresponding to this buffer context. + * AV_PIX_FMT_NONE means this is an encoded stream. + */ + enum AVPixelFormat av_pix_fmt; + + /** + * AVCodecID corresponding to this buffer context. + * AV_CODEC_ID_RAWVIDEO means this is a raw stream and av_pix_fmt must be set to a valid value. + */ + enum AVCodecID av_codec_id; + + /** + * Format returned by the driver after initializing the buffer context. + * Readonly after init. + */ + struct v4l2_format format; + + /** + * Width and height of the frames it produces (in case of a capture context, e.g. when decoding) + * or accepts (in case of an output context, e.g. when encoding). + */ + int width, height; + + /** + * Indexed array of V4L2Buffers + */ + V4L2Buffer *buffers; + + /** + * Readonly after init. + */ + int num_buffers; + + /** + * Whether the stream has been started (VIDIOC_STREAMON has been sent). + */ + int streamon; + + /** + * Either no more buffers available or an unrecoverable error was notified + * by the V4L2 kernel driver: once set the context has to be exited. + */ + int done; + +} V4L2Context; + +/** + * Initializes a V4L2Context. + * + * @param[in] ctx A pointer to a V4L2Context. See V4L2Context description for required variables. + * @return 0 in case of success, a negative value representing the error otherwise. + */ +int ff_v4l2_context_init(V4L2Context* ctx); + +/** + * Sets the V4L2Context format in the v4l2 driver. + * + * @param[in] ctx A pointer to a V4L2Context. See V4L2Context description for required variables. + * @return 0 in case of success, a negative value representing the error otherwise. + */ +int ff_v4l2_context_set_format(V4L2Context* ctx); + +/** + * Queries the driver for a valid v4l2 format and copies it to the context. + * + * @param[in] ctx A pointer to a V4L2Context. See V4L2Context description for required variables. + * @return 0 in case of success, a negative value representing the error otherwise. + */ +int ff_v4l2_context_get_format(V4L2Context* ctx); + +/** + * Releases a V4L2Context. + * + * @param[in] ctx A pointer to a V4L2Context. + * The caller is reponsible for freeing it. + * It must not be used after calling this function. + */ +void ff_v4l2_context_release(V4L2Context* ctx); + +/** + * Sets the status of a V4L2Context. + * + * @param[in] ctx A pointer to a V4L2Context. + * @param[in] cmd The status to set (VIDIOC_STREAMON or VIDIOC_STREAMOFF). + * Warning: If VIDIOC_STREAMOFF is sent to a buffer context that still has some frames buffered, + * those frames will be dropped. + * @return 0 in case of success, a negative value representing the error otherwise. + */ +int ff_v4l2_context_set_status(V4L2Context* ctx, uint32_t cmd); + +/** + * Dequeues a buffer from a V4L2Context to an AVPacket. + * + * The pkt must be non NULL. + * @param[in] ctx The V4L2Context to dequeue from. + * @param[inout] pkt The AVPacket to dequeue to. + * @return 0 in case of success, AVERROR(EAGAIN) if no buffer was ready, another negative error in case of error. + */ +int ff_v4l2_context_dequeue_packet(V4L2Context* ctx, AVPacket* pkt); + +/** + * Dequeues a buffer from a V4L2Context to an AVFrame. + * + * The frame must be non NULL. + * @param[in] ctx The V4L2Context to dequeue from. + * @param[inout] f The AVFrame to dequeue to. + * @return 0 in case of success, AVERROR(EAGAIN) if no buffer was ready, another negative error in case of error. + */ +int ff_v4l2_context_dequeue_frame(V4L2Context* ctx, AVFrame* f); + +/** + * Enqueues a buffer to a V4L2Context from an AVPacket + * + * The packet must be non NULL. + * When the size of the pkt is null, the buffer is not queued but a V4L2_DEC_CMD_STOP command is sent instead to the driver. + * + * @param[in] ctx The V4L2Context to enqueue to. + * @param[in] pkt A pointer to an AVPacket. + * @return 0 in case of success, a negative error otherwise. + */ +int ff_v4l2_context_enqueue_packet(V4L2Context* ctx, const AVPacket* pkt); + +/** + * Enqueues a buffer to a V4L2Context from an AVFrame + * + * The frame must be non NULL. + * + * @param[in] ctx The V4L2Context to enqueue to. + * @param[in] f A pointer to an AVFrame to enqueue. + * @return 0 in case of success, a negative error otherwise. + */ +int ff_v4l2_context_enqueue_frame(V4L2Context* ctx, const AVFrame* f); + +#endif // AVCODEC_V4L2_CONTEXT_H diff --git a/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_fmt.c b/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_fmt.c new file mode 100644 index 000000000..6df47e3f5 --- /dev/null +++ b/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_fmt.c @@ -0,0 +1,141 @@ +/* + * V4L2 format helper functions + * + * Copyright (C) 2017 Alexis Ballier + * Copyright (C) 2017 Jorge Ramirez + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include +#include "v4l2_fmt.h" + +#define V4L2_FMT(x) V4L2_PIX_FMT_##x +#define AV_CODEC(x) AV_CODEC_ID_##x +#define AV_FMT(x) AV_PIX_FMT_##x + +static const struct fmt_conversion { + enum AVPixelFormat avfmt; + enum AVCodecID avcodec; + uint32_t v4l2_fmt; +} fmt_map[] = { + { AV_FMT(RGB555LE), AV_CODEC(RAWVIDEO), V4L2_FMT(RGB555) }, + { AV_FMT(RGB555BE), AV_CODEC(RAWVIDEO), V4L2_FMT(RGB555X) }, + { AV_FMT(RGB565LE), AV_CODEC(RAWVIDEO), V4L2_FMT(RGB565) }, + { AV_FMT(RGB565BE), AV_CODEC(RAWVIDEO), V4L2_FMT(RGB565X) }, + { AV_FMT(BGR24), AV_CODEC(RAWVIDEO), V4L2_FMT(BGR24) }, + { AV_FMT(RGB24), AV_CODEC(RAWVIDEO), V4L2_FMT(RGB24) }, + { AV_FMT(BGR0), AV_CODEC(RAWVIDEO), V4L2_FMT(BGR32) }, + { AV_FMT(0RGB), AV_CODEC(RAWVIDEO), V4L2_FMT(RGB32) }, + { AV_FMT(GRAY8), AV_CODEC(RAWVIDEO), V4L2_FMT(GREY) }, + { AV_FMT(YUV420P), AV_CODEC(RAWVIDEO), V4L2_FMT(YUV420) }, + { AV_FMT(YUYV422), AV_CODEC(RAWVIDEO), V4L2_FMT(YUYV) }, + { AV_FMT(UYVY422), AV_CODEC(RAWVIDEO), V4L2_FMT(UYVY) }, + { AV_FMT(YUV422P), AV_CODEC(RAWVIDEO), V4L2_FMT(YUV422P) }, + { AV_FMT(YUV411P), AV_CODEC(RAWVIDEO), V4L2_FMT(YUV411P) }, + { AV_FMT(YUV410P), AV_CODEC(RAWVIDEO), V4L2_FMT(YUV410) }, + { AV_FMT(YUV410P), AV_CODEC(RAWVIDEO), V4L2_FMT(YVU410) }, + { AV_FMT(NV12), AV_CODEC(RAWVIDEO), V4L2_FMT(NV12) }, + { AV_FMT(NONE), AV_CODEC(MJPEG), V4L2_FMT(MJPEG) }, + { AV_FMT(NONE), AV_CODEC(MJPEG), V4L2_FMT(JPEG) }, +#ifdef V4L2_PIX_FMT_SRGGB8 + { AV_FMT(BAYER_BGGR8), AV_CODEC(RAWVIDEO), V4L2_FMT(SBGGR8) }, + { AV_FMT(BAYER_GBRG8), AV_CODEC(RAWVIDEO), V4L2_FMT(SGBRG8) }, + { AV_FMT(BAYER_GRBG8), AV_CODEC(RAWVIDEO), V4L2_FMT(SGRBG8) }, + { AV_FMT(BAYER_RGGB8), AV_CODEC(RAWVIDEO), V4L2_FMT(SRGGB8) }, +#endif +#ifdef V4L2_PIX_FMT_Y16 + { AV_FMT(GRAY16LE), AV_CODEC(RAWVIDEO), V4L2_FMT(Y16) }, +#endif +#ifdef V4L2_PIX_FMT_NV12M + { AV_FMT(NV12), AV_CODEC(RAWVIDEO), V4L2_FMT(NV12M) }, +#endif +#ifdef V4L2_PIX_FMT_NV21M + { AV_FMT(NV21), AV_CODEC(RAWVIDEO), V4L2_FMT(NV21M) }, +#endif +#ifdef V4L2_PIX_FMT_YUV420M + { AV_FMT(YUV420P), AV_CODEC(RAWVIDEO), V4L2_FMT(YUV420M) }, +#endif +#ifdef V4L2_PIX_FMT_NV16M + { AV_FMT(NV16), AV_CODEC(RAWVIDEO), V4L2_FMT(NV16M) }, +#endif +#ifdef V4L2_PIX_FMT_H263 + { AV_FMT(NONE), AV_CODEC(H263), V4L2_FMT(H263) }, +#endif +#ifdef V4L2_PIX_FMT_H264 + { AV_FMT(NONE), AV_CODEC(H264), V4L2_FMT(H264) }, +#endif +#ifdef V4L2_PIX_FMT_MPEG4 + { AV_FMT(NONE), AV_CODEC(MPEG4), V4L2_FMT(MPEG4) }, +#endif +#ifdef V4L2_PIX_FMT_CPIA1 + { AV_FMT(NONE), AV_CODEC(CPIA), V4L2_FMT(CPIA1) }, +#endif +#ifdef V4L2_PIX_FMT_DV + { AV_FMT(NONE), AV_CODEC(DVVIDEO), V4L2_FMT(DV) }, +#endif +#ifdef V4L2_PIX_FMT_MPEG1 + { AV_FMT(NONE), AV_CODEC(MPEG1VIDEO), V4L2_FMT(MPEG1) }, +#endif +#ifdef V4L2_PIX_FMT_MPEG2 + { AV_FMT(NONE), AV_CODEC(MPEG2VIDEO), V4L2_FMT(MPEG2) }, +#endif +#ifdef V4L2_PIX_FMT_VP8 + { AV_FMT(NONE), AV_CODEC(VP8), V4L2_FMT(VP8) }, +#endif +#ifdef V4L2_PIX_FMT_VP9 + { AV_FMT(NONE), AV_CODEC(VP9), V4L2_FMT(VP9) }, +#endif +#ifdef V4L2_PIX_FMT_HEVC + { AV_FMT(NONE), AV_CODEC(HEVC), V4L2_FMT(HEVC) }, +#endif +#ifdef V4L2_PIX_FMT_VC1_ANNEX_G + { AV_FMT(NONE), AV_CODEC(VC1), V4L2_FMT(VC1_ANNEX_G) }, +#endif +}; + +uint32_t ff_v4l2_format_avcodec_to_v4l2(enum AVCodecID avcodec) +{ + int i; + for (i = 0; i < FF_ARRAY_ELEMS(fmt_map); i++) { + if (fmt_map[i].avcodec == avcodec) + return fmt_map[i].v4l2_fmt; + } + return 0; +} + +uint32_t ff_v4l2_format_avfmt_to_v4l2(enum AVPixelFormat avfmt) +{ + int i; + for (i = 0; i < FF_ARRAY_ELEMS(fmt_map); i++) { + if (fmt_map[i].avfmt == avfmt) + return fmt_map[i].v4l2_fmt; + } + return 0; +} + +enum AVPixelFormat ff_v4l2_format_v4l2_to_avfmt(uint32_t v4l2_fmt, enum AVCodecID avcodec) +{ + int i; + for (i = 0; i < FF_ARRAY_ELEMS(fmt_map); i++) { + if (fmt_map[i].avcodec == avcodec && + fmt_map[i].v4l2_fmt == v4l2_fmt) + return fmt_map[i].avfmt; + } + return AV_PIX_FMT_NONE; +} diff --git a/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_fmt.h b/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_fmt.h new file mode 100644 index 000000000..01360029c --- /dev/null +++ b/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_fmt.h @@ -0,0 +1,34 @@ +/* + * V4L2 format helper functions + * + * Copyright (C) 2017 Alexis Ballier + * Copyright (C) 2017 Jorge Ramirez + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef AVCODEC_V4L2_FMT_H +#define AVCODEC_V4L2_FMT_H + +#include "libavcodec/avcodec.h" +#include "libavutil/pixfmt.h" + +enum AVPixelFormat ff_v4l2_format_v4l2_to_avfmt(uint32_t v4l2_fmt, enum AVCodecID avcodec); +uint32_t ff_v4l2_format_avcodec_to_v4l2(enum AVCodecID avcodec); +uint32_t ff_v4l2_format_avfmt_to_v4l2(enum AVPixelFormat avfmt); + +#endif /* AVCODEC_V4L2_FMT_H*/ diff --git a/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_m2m.c b/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_m2m.c new file mode 100644 index 000000000..427e165f5 --- /dev/null +++ b/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_m2m.c @@ -0,0 +1,406 @@ +/* + * V4L mem2mem + * + * Copyright (C) 2017 Alexis Ballier + * Copyright (C) 2017 Jorge Ramirez + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include +#include +#include +#include +#include +#include "libavcodec/avcodec.h" +#include "libavcodec/internal.h" +#include "libavutil/pixdesc.h" +#include "libavutil/imgutils.h" +#include "libavutil/pixfmt.h" +#include "v4l2_context.h" +#include "v4l2_fmt.h" +#include "v4l2_m2m.h" + +static inline int v4l2_splane_video(struct v4l2_capability *cap) +{ + if (cap->capabilities & (V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT) && + cap->capabilities & V4L2_CAP_STREAMING) + return 1; + + if (cap->capabilities & V4L2_CAP_VIDEO_M2M) + return 1; + + return 0; +} + +static inline int v4l2_mplane_video(struct v4l2_capability *cap) +{ + if (cap->capabilities & (V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_VIDEO_OUTPUT_MPLANE) && + cap->capabilities & V4L2_CAP_STREAMING) + return 1; + + if (cap->capabilities & V4L2_CAP_VIDEO_M2M_MPLANE) + return 1; + + return 0; +} + +static int v4l2_prepare_contexts(V4L2m2mContext* s) +{ + struct v4l2_capability cap; + int ret; + + s->capture.done = s->output.done = 0; + s->capture.name = "capture"; + s->output.name = "output "; + atomic_init(&s->refcount, 0); + sem_init(&s->refsync, 0, 0); + + memset(&cap, 0, sizeof(cap)); + ret = ioctl(s->fd, VIDIOC_QUERYCAP, &cap); + if (ret < 0) + return ret; + + av_log(s->avctx, AV_LOG_INFO, "driver '%s' on card '%s'\n", cap.driver, cap.card); + + if (v4l2_mplane_video(&cap)) { + s->capture.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE; + s->output.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE; + return 0; + } + + if (v4l2_splane_video(&cap)) { + s->capture.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + s->output.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; + return 0; + } + + return AVERROR(EINVAL); +} + +static int v4l2_probe_driver(V4L2m2mContext* s) +{ + int ret; + + s->fd = open(s->devname, O_RDWR | O_NONBLOCK, 0); + if (s->fd < 0) + return AVERROR(errno); + + ret = v4l2_prepare_contexts(s); + if (ret < 0) + goto done; + + ret = ff_v4l2_context_get_format(&s->output); + if (ret) { + av_log(s->avctx, AV_LOG_DEBUG, "v4l2 output format not supported\n"); + goto done; + } + + ret = ff_v4l2_context_get_format(&s->capture); + if (ret) { + av_log(s->avctx, AV_LOG_DEBUG, "v4l2 capture format not supported\n"); + goto done; + } + +done: + if (close(s->fd) < 0) { + ret = AVERROR(errno); + av_log(s->avctx, AV_LOG_ERROR, "failure closing %s (%s)\n", s->devname, av_err2str(AVERROR(errno))); + } + + s->fd = -1; + + return ret; +} + +static int v4l2_configure_contexts(V4L2m2mContext* s) +{ + void *log_ctx = s->avctx; + int ret; + + s->fd = open(s->devname, O_RDWR | O_NONBLOCK, 0); + if (s->fd < 0) + return AVERROR(errno); + + ret = v4l2_prepare_contexts(s); + if (ret < 0) + goto error; + + ret = ff_v4l2_context_set_format(&s->output); + if (ret) { + av_log(log_ctx, AV_LOG_ERROR, "can't set v4l2 output format\n"); + goto error; + } + + ret = ff_v4l2_context_set_format(&s->capture); + if (ret) { + av_log(log_ctx, AV_LOG_ERROR, "can't to set v4l2 capture format\n"); + goto error; + } + + ret = ff_v4l2_context_init(&s->output); + if (ret) { + av_log(log_ctx, AV_LOG_ERROR, "no v4l2 output context's buffers\n"); + goto error; + } + + /* decoder's buffers need to be updated at a later stage */ + if (!av_codec_is_decoder(s->avctx->codec)) { + ret = ff_v4l2_context_init(&s->capture); + if (ret) { + av_log(log_ctx, AV_LOG_ERROR, "no v4l2 capture context's buffers\n"); + goto error; + } + } + + return 0; + +error: + if (close(s->fd) < 0) { + ret = AVERROR(errno); + av_log(log_ctx, AV_LOG_ERROR, "error closing %s (%s)\n", + s->devname, av_err2str(AVERROR(errno))); + } + s->fd = -1; + + return ret; +} + +/****************************************************************************** + * + * V4L2 M2M Interface + * + ******************************************************************************/ +int ff_v4l2_m2m_codec_reinit(V4L2m2mContext* s) +{ + int ret; + + av_log(s->avctx, AV_LOG_DEBUG, "reinit context\n"); + + /* 1. streamoff */ + ret = ff_v4l2_context_set_status(&s->capture, VIDIOC_STREAMOFF); + if (ret) + av_log(s->avctx, AV_LOG_ERROR, "capture VIDIOC_STREAMOFF\n"); + + /* 2. unmap the capture buffers (v4l2 and ffmpeg): + * we must wait for all references to be released before being allowed + * to queue new buffers. + */ + av_log(s->avctx, AV_LOG_DEBUG, "waiting for user to release AVBufferRefs\n"); + if (atomic_load(&s->refcount)) + while(sem_wait(&s->refsync) == -1 && errno == EINTR); + + ff_v4l2_context_release(&s->capture); + + /* 3. get the new capture format */ + ret = ff_v4l2_context_get_format(&s->capture); + if (ret) { + av_log(s->avctx, AV_LOG_ERROR, "query the new capture format\n"); + return ret; + } + + /* 4. set the capture format */ + ret = ff_v4l2_context_set_format(&s->capture); + if (ret) { + av_log(s->avctx, AV_LOG_ERROR, "setting capture format\n"); + return ret; + } + + /* 5. complete reinit */ + s->draining = 0; + s->reinit = 0; + + return 0; +} + +int ff_v4l2_m2m_codec_full_reinit(V4L2m2mContext *s) +{ + void *log_ctx = s->avctx; + int ret; + + av_log(log_ctx, AV_LOG_DEBUG, "%s full reinit\n", s->devname); + + /* wait for pending buffer references */ + if (atomic_load(&s->refcount)) + while(sem_wait(&s->refsync) == -1 && errno == EINTR); + + ret = ff_v4l2_context_set_status(&s->output, VIDIOC_STREAMOFF); + if (ret) { + av_log(s->avctx, AV_LOG_ERROR, "output VIDIOC_STREAMOFF\n"); + goto error; + } + + ret = ff_v4l2_context_set_status(&s->capture, VIDIOC_STREAMOFF); + if (ret) { + av_log(s->avctx, AV_LOG_ERROR, "capture VIDIOC_STREAMOFF\n"); + goto error; + } + + /* release and unmmap the buffers */ + ff_v4l2_context_release(&s->output); + ff_v4l2_context_release(&s->capture); + + /* start again now that we know the stream dimensions */ + s->draining = 0; + s->reinit = 0; + + ret = ff_v4l2_context_get_format(&s->output); + if (ret) { + av_log(log_ctx, AV_LOG_DEBUG, "v4l2 output format not supported\n"); + goto error; + } + + ret = ff_v4l2_context_get_format(&s->capture); + if (ret) { + av_log(log_ctx, AV_LOG_DEBUG, "v4l2 capture format not supported\n"); + goto error; + } + + ret = ff_v4l2_context_set_format(&s->output); + if (ret) { + av_log(log_ctx, AV_LOG_ERROR, "can't set v4l2 output format\n"); + goto error; + } + + ret = ff_v4l2_context_set_format(&s->capture); + if (ret) { + av_log(log_ctx, AV_LOG_ERROR, "can't to set v4l2 capture format\n"); + goto error; + } + + ret = ff_v4l2_context_init(&s->output); + if (ret) { + av_log(log_ctx, AV_LOG_ERROR, "no v4l2 output context's buffers\n"); + goto error; + } + + /* decoder's buffers need to be updated at a later stage */ + if (!av_codec_is_decoder(s->avctx->codec)) { + ret = ff_v4l2_context_init(&s->capture); + if (ret) { + av_log(log_ctx, AV_LOG_ERROR, "no v4l2 capture context's buffers\n"); + goto error; + } + } + + return 0; + +error: + return ret; +} + +static void v4l2_m2m_destroy_context(void *opaque, uint8_t *context) +{ + V4L2m2mContext *s = (V4L2m2mContext*)context; + + ff_v4l2_context_release(&s->capture); + sem_destroy(&s->refsync); + + close(s->fd); + + av_free(s); +} + +int ff_v4l2_m2m_codec_end(AVCodecContext *avctx) +{ + V4L2m2mPriv *priv = avctx->priv_data; + V4L2m2mContext* s = priv->context; + int ret; + + ret = ff_v4l2_context_set_status(&s->output, VIDIOC_STREAMOFF); + if (ret) + av_log(avctx, AV_LOG_ERROR, "VIDIOC_STREAMOFF %s\n", s->output.name); + + ret = ff_v4l2_context_set_status(&s->capture, VIDIOC_STREAMOFF); + if (ret) + av_log(avctx, AV_LOG_ERROR, "VIDIOC_STREAMOFF %s\n", s->capture.name); + + ff_v4l2_context_release(&s->output); + + s->self_ref = NULL; + av_buffer_unref(&priv->context_ref); + + return 0; +} + +int ff_v4l2_m2m_codec_init(AVCodecContext *avctx) +{ + int ret = AVERROR(EINVAL); + struct dirent *entry; + char node[PATH_MAX]; + DIR *dirp; + + V4L2m2mContext *s = ((V4L2m2mPriv*)avctx->priv_data)->context; + s->avctx = avctx; + + dirp = opendir("/dev"); + if (!dirp) + return AVERROR(errno); + + for (entry = readdir(dirp); entry; entry = readdir(dirp)) { + + if (strncmp(entry->d_name, "video", 5)) + continue; + + snprintf(node, sizeof(node), "/dev/%s", entry->d_name); + av_log(s->avctx, AV_LOG_DEBUG, "probing device %s\n", node); + strncpy(s->devname, node, strlen(node) + 1); + ret = v4l2_probe_driver(s); + if (!ret) + break; + } + + closedir(dirp); + + if (ret) { + av_log(s->avctx, AV_LOG_ERROR, "Could not find a valid device\n"); + memset(s->devname, 0, sizeof(s->devname)); + + return ret; + } + + av_log(s->avctx, AV_LOG_INFO, "Using device %s\n", node); + + return v4l2_configure_contexts(s); +} + +int ff_v4l2_m2m_create_context(AVCodecContext *avctx, V4L2m2mContext **s) +{ + V4L2m2mPriv *priv = avctx->priv_data; + + *s = av_mallocz(sizeof(V4L2m2mContext)); + if (!*s) + return AVERROR(ENOMEM); + + priv->context_ref = av_buffer_create((uint8_t *) *s, sizeof(V4L2m2mContext), + &v4l2_m2m_destroy_context, NULL, 0); + if (!priv->context_ref) { + av_freep(s); + return AVERROR(ENOMEM); + } + + /* assign the context */ + priv->context = *s; + + /* populate it */ + priv->context->capture.num_buffers = priv->num_capture_buffers; + priv->context->output.num_buffers = priv->num_output_buffers; + priv->context->self_ref = priv->context_ref; + + return 0; +} diff --git a/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_m2m.h b/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_m2m.h new file mode 100644 index 000000000..0d4671beb --- /dev/null +++ b/trunk/3rdparty/ffmpeg-4.2-fit/libavcodec/v4l2_m2m.h @@ -0,0 +1,126 @@ +/* + * V4L2 mem2mem helper functions + * + * Copyright (C) 2017 Alexis Ballier + * Copyright (C) 2017 Jorge Ramirez + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef AVCODEC_V4L2_M2M_H +#define AVCODEC_V4L2_M2M_H + +#include +#include +#include +#include + +#include "libavcodec/avcodec.h" +#include "v4l2_context.h" + +#define container_of(ptr, type, member) ({ \ + const __typeof__(((type *)0)->member ) *__mptr = (ptr); \ + (type *)((char *)__mptr - offsetof(type,member) );}) + +#define V4L_M2M_DEFAULT_OPTS \ + { "num_output_buffers", "Number of buffers in the output context",\ + OFFSET(num_output_buffers), AV_OPT_TYPE_INT, { .i64 = 16 }, 6, INT_MAX, FLAGS } + +typedef struct V4L2m2mContext { + char devname[PATH_MAX]; + int fd; + + /* the codec context queues */ + V4L2Context capture; + V4L2Context output; + + /* dynamic stream reconfig */ + AVCodecContext *avctx; + sem_t refsync; + atomic_uint refcount; + int reinit; + + /* null frame/packet received */ + int draining; + + /* Reference to self; only valid while codec is active. */ + AVBufferRef *self_ref; +} V4L2m2mContext; + +typedef struct V4L2m2mPriv +{ + AVClass *class; + + V4L2m2mContext *context; + AVBufferRef *context_ref; + + int num_output_buffers; + int num_capture_buffers; +} V4L2m2mPriv; + +/** + * Allocate a new context and references for a V4L2 M2M instance. + * + * @param[in] ctx The AVCodecContext instantiated by the encoder/decoder. + * @param[out] ctx The V4L2m2mContext. + * + * @returns 0 in success, a negative error code otherwise. + */ +int ff_v4l2_m2m_create_context(AVCodecContext *avctx, V4L2m2mContext **s); + + +/** + * Probes the video nodes looking for the required codec capabilities. + * + * @param[in] ctx The AVCodecContext instantiated by the encoder/decoder. + * + * @returns 0 if a driver is found, a negative number otherwise. + */ +int ff_v4l2_m2m_codec_init(AVCodecContext *avctx); + +/** + * Releases all the codec resources if all AVBufferRefs have been returned to the + * ctx. Otherwise keep the driver open. + * + * @param[in] The AVCodecContext instantiated by the encoder/decoder. + * + * @returns 0 + * + */ +int ff_v4l2_m2m_codec_end(AVCodecContext *avctx); + +/** + * Reinitializes the V4L2m2mContext when the driver cannot continue processing + * with the capture parameters. + * + * @param[in] ctx The V4L2m2mContext instantiated by the encoder/decoder. + * + * @returns 0 in case of success, negative number otherwise + */ +int ff_v4l2_m2m_codec_reinit(V4L2m2mContext *ctx); + +/** + * Reinitializes the V4L2m2mContext when the driver cannot continue processing + * with the any of the current V4L2Contexts (ie, changes in output and capture). + * + * @param[in] ctx The V4L2m2mContext instantiated by the encoder/decoder. + * + * @returns 0 in case of success, negative number otherwise + */ +int ff_v4l2_m2m_codec_full_reinit(V4L2m2mContext *ctx); + +#endif /* AVCODEC_V4L2_M2M_H */