From 51b56a07160254094f13a7d2eea288369c9ca128 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?R=C3=A9mi=20Denis-Courmont?= Date: Sat, 12 Jan 2013 17:53:46 +0200 Subject: [PATCH 1/3] vdpau: Add H.264 decoding via hwaccel infrastructure Signed-off-by: Diego Biurrun --- configure | 1 + libavcodec/Makefile | 1 + libavcodec/allcodecs.c | 1 + libavcodec/vdpau_h264.c | 196 ++++++++++++++++++++++++++++++++++++++++ libavcodec/version.h | 2 +- 5 files changed, 200 insertions(+), 1 deletion(-) create mode 100644 libavcodec/vdpau_h264.c diff --git a/configure b/configure index 8f21a49c06..c62ea2d803 100755 --- a/configure +++ b/configure @@ -1608,6 +1608,7 @@ h264_dxva2_hwaccel_select="dxva2 h264_decoder" h264_vaapi_hwaccel_select="vaapi h264_decoder" h264_vda_hwaccel_select="vda h264_decoder" h264_vdpau_decoder_select="vdpau h264_decoder" +h264_vdpau_hwaccel_select="vdpau h264_decoder" mpeg_vdpau_decoder_select="vdpau mpegvideo_decoder" mpeg1_vdpau_decoder_select="vdpau mpeg1video_decoder" mpeg1_vdpau_hwaccel_select="vdpau mpeg1video_decoder" diff --git a/libavcodec/Makefile b/libavcodec/Makefile index e7f1233485..3f5b938cfc 100644 --- a/libavcodec/Makefile +++ b/libavcodec/Makefile @@ -199,6 +199,7 @@ OBJS-$(CONFIG_H264_DECODER) += h264.o \ OBJS-$(CONFIG_H264_DXVA2_HWACCEL) += dxva2_h264.o OBJS-$(CONFIG_H264_VAAPI_HWACCEL) += vaapi_h264.o OBJS-$(CONFIG_H264_VDA_HWACCEL) += vda_h264.o +OBJS-$(CONFIG_H264_VDPAU_HWACCEL) += vdpau_h264.o OBJS-$(CONFIG_HUFFYUV_DECODER) += huffyuv.o huffyuvdec.o OBJS-$(CONFIG_HUFFYUV_ENCODER) += huffyuv.o huffyuvenc.o OBJS-$(CONFIG_IAC_DECODER) += imc.o diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c index 0bb9976f74..ac8119a3d5 100644 --- a/libavcodec/allcodecs.c +++ b/libavcodec/allcodecs.c @@ -78,6 +78,7 @@ void avcodec_register_all(void) REGISTER_HWACCEL(H264_DXVA2, h264_dxva2); REGISTER_HWACCEL(H264_VAAPI, h264_vaapi); REGISTER_HWACCEL(H264_VDA, h264_vda); + REGISTER_HWACCEL(H264_VDPAU, h264_vdpau); REGISTER_HWACCEL(MPEG1_VDPAU, mpeg1_vdpau); REGISTER_HWACCEL(MPEG2_DXVA2, mpeg2_dxva2); REGISTER_HWACCEL(MPEG2_VAAPI, mpeg2_vaapi); diff --git a/libavcodec/vdpau_h264.c b/libavcodec/vdpau_h264.c new file mode 100644 index 0000000000..09b7ad5212 --- /dev/null +++ b/libavcodec/vdpau_h264.c @@ -0,0 +1,196 @@ +/* + * MPEG-4 Part 10 / AVC / H.264 HW decode acceleration through VDPAU + * + * Copyright (c) 2008 NVIDIA + * Copyright (c) 2013 Rémi Denis-Courmont + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#include "avcodec.h" +#include "h264.h" +#include "vdpau.h" +#include "vdpau_internal.h" + +static int32_t h264_foc(int foc) +{ + if (foc == INT_MAX) + foc = 0; + return foc; +} + +static void vdpau_h264_clear_rf(VdpReferenceFrameH264 *rf) +{ + rf->surface = VDP_INVALID_HANDLE; + rf->is_long_term = VDP_FALSE; + rf->top_is_reference = VDP_FALSE; + rf->bottom_is_reference = VDP_FALSE; + rf->field_order_cnt[0] = 0; + rf->field_order_cnt[1] = 0; + rf->frame_idx = 0; +} + +static void vdpau_h264_set_rf(VdpReferenceFrameH264 *rf, Picture *pic, + int pic_structure) +{ + VdpVideoSurface surface = ff_vdpau_get_surface_id(pic); + + if (pic_structure == 0) + pic_structure = pic->f.reference; + + rf->surface = surface; + rf->is_long_term = pic->f.reference && pic->long_ref; + rf->top_is_reference = (pic_structure & PICT_TOP_FIELD) != 0; + rf->bottom_is_reference = (pic_structure & PICT_BOTTOM_FIELD) != 0; + rf->field_order_cnt[0] = h264_foc(pic->field_poc[0]); + rf->field_order_cnt[1] = h264_foc(pic->field_poc[1]); + rf->frame_idx = pic->long_ref ? pic->pic_id : pic->frame_num; +} + +static void vdpau_h264_set_reference_frames(AVCodecContext *avctx) +{ + H264Context * const h = avctx->priv_data; + AVVDPAUContext *hwctx = avctx->hwaccel_context; + VdpPictureInfoH264 *info = &hwctx->info.h264; + int list; + + VdpReferenceFrameH264 *rf = &info->referenceFrames[0]; +#define H264_RF_COUNT FF_ARRAY_ELEMS(info->referenceFrames) + + for (list = 0; list < 2; ++list) { + Picture **lp = list ? h->long_ref : h->short_ref; + int i, ls = list ? 16 : h->short_ref_count; + + for (i = 0; i < ls; ++i) { + Picture *pic = lp[i]; + VdpReferenceFrameH264 *rf2; + VdpVideoSurface surface_ref; + int pic_frame_idx; + + if (!pic || !pic->f.reference) + continue; + pic_frame_idx = pic->long_ref ? pic->pic_id : pic->frame_num; + surface_ref = ff_vdpau_get_surface_id(pic); + + rf2 = &info->referenceFrames[0]; + while (rf2 != rf) { + if ((rf2->surface == surface_ref) && + (rf2->is_long_term == pic->long_ref) && + (rf2->frame_idx == pic_frame_idx)) + break; + ++rf2; + } + if (rf2 != rf) { + rf2->top_is_reference |= (pic->f.reference & PICT_TOP_FIELD) ? VDP_TRUE : VDP_FALSE; + rf2->bottom_is_reference |= (pic->f.reference & PICT_BOTTOM_FIELD) ? VDP_TRUE : VDP_FALSE; + continue; + } + + if (rf >= &info->referenceFrames[H264_RF_COUNT]) + continue; + + vdpau_h264_set_rf(rf, pic, pic->f.reference); + ++rf; + } + } + + for (; rf < &info->referenceFrames[H264_RF_COUNT]; ++rf) + vdpau_h264_clear_rf(rf); +} + +static int vdpau_h264_start_frame(AVCodecContext *avctx, + const uint8_t *buffer, uint32_t size) +{ + H264Context * const h = avctx->priv_data; + AVVDPAUContext *hwctx = avctx->hwaccel_context; + MpegEncContext * const s = &h->s; + VdpPictureInfoH264 *info = &hwctx->info.h264; + Picture *pic = s->current_picture_ptr; + + /* init VdpPictureInfoH264 */ + info->slice_count = 0; + info->field_order_cnt[0] = h264_foc(pic->field_poc[0]); + info->field_order_cnt[1] = h264_foc(pic->field_poc[1]); + info->is_reference = h->nal_ref_idc != 0; + info->frame_num = h->frame_num; + info->field_pic_flag = s->picture_structure != PICT_FRAME; + info->bottom_field_flag = s->picture_structure == PICT_BOTTOM_FIELD; + info->num_ref_frames = h->sps.ref_frame_count; + info->mb_adaptive_frame_field_flag = h->sps.mb_aff && !info->field_pic_flag; + info->constrained_intra_pred_flag = h->pps.constrained_intra_pred; + info->weighted_pred_flag = h->pps.weighted_pred; + info->weighted_bipred_idc = h->pps.weighted_bipred_idc; + info->frame_mbs_only_flag = h->sps.frame_mbs_only_flag; + info->transform_8x8_mode_flag = h->pps.transform_8x8_mode; + info->chroma_qp_index_offset = h->pps.chroma_qp_index_offset[0]; + info->second_chroma_qp_index_offset = h->pps.chroma_qp_index_offset[1]; + info->pic_init_qp_minus26 = h->pps.init_qp - 26; + info->num_ref_idx_l0_active_minus1 = h->pps.ref_count[0] - 1; + info->num_ref_idx_l1_active_minus1 = h->pps.ref_count[1] - 1; + info->log2_max_frame_num_minus4 = h->sps.log2_max_frame_num - 4; + info->pic_order_cnt_type = h->sps.poc_type; + info->log2_max_pic_order_cnt_lsb_minus4 = h->sps.poc_type ? 0 : h->sps.log2_max_poc_lsb - 4; + info->delta_pic_order_always_zero_flag = h->sps.delta_pic_order_always_zero_flag; + info->direct_8x8_inference_flag = h->sps.direct_8x8_inference_flag; + info->entropy_coding_mode_flag = h->pps.cabac; + info->pic_order_present_flag = h->pps.pic_order_present; + info->deblocking_filter_control_present_flag = h->pps.deblocking_filter_parameters_present; + info->redundant_pic_cnt_present_flag = h->pps.redundant_pic_cnt_present; + + memcpy(info->scaling_lists_4x4, h->pps.scaling_matrix4, + sizeof(info->scaling_lists_4x4)); + memcpy(info->scaling_lists_8x8[0], h->pps.scaling_matrix8[0], + sizeof(info->scaling_lists_8x8[0])); + memcpy(info->scaling_lists_8x8[1], h->pps.scaling_matrix8[3], + sizeof(info->scaling_lists_8x8[1])); + + vdpau_h264_set_reference_frames(avctx); + + return ff_vdpau_common_start_frame(avctx, buffer, size); +} + +static const uint8_t start_code_prefix[3] = { 0x00, 0x00, 0x01 }; + +static int vdpau_h264_decode_slice(AVCodecContext *avctx, + const uint8_t *buffer, uint32_t size) +{ + AVVDPAUContext *hwctx = avctx->hwaccel_context; + int val; + + val = ff_vdpau_add_buffer(avctx, start_code_prefix, 3); + if (val) + return val; + + val = ff_vdpau_add_buffer(avctx, buffer, size); + if (val) + return val; + + hwctx->info.h264.slice_count++; + return 0; +} + +AVHWAccel ff_h264_vdpau_hwaccel = { + .name = "h264_vdpau", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_H264, + .pix_fmt = AV_PIX_FMT_VDPAU, + .start_frame = vdpau_h264_start_frame, + .end_frame = ff_vdpau_common_end_frame, + .decode_slice = vdpau_h264_decode_slice, +}; diff --git a/libavcodec/version.h b/libavcodec/version.h index 856455fc41..54e6179e7f 100644 --- a/libavcodec/version.h +++ b/libavcodec/version.h @@ -27,7 +27,7 @@ */ #define LIBAVCODEC_VERSION_MAJOR 54 -#define LIBAVCODEC_VERSION_MINOR 38 +#define LIBAVCODEC_VERSION_MINOR 39 #define LIBAVCODEC_VERSION_MICRO 0 #define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \ From 775253278914d82ca3598b2d48e4ce0c6e05452a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?R=C3=A9mi=20Denis-Courmont?= Date: Sat, 12 Jan 2013 17:53:47 +0200 Subject: [PATCH 2/3] vdpau: Add VC-1 decoding via hwaccel infrastructure Signed-off-by: Diego Biurrun --- configure | 2 + libavcodec/Makefile | 1 + libavcodec/allcodecs.c | 2 + libavcodec/vdpau_vc1.c | 128 +++++++++++++++++++++++++++++++++++++++++ libavcodec/version.h | 2 +- 5 files changed, 134 insertions(+), 1 deletion(-) create mode 100644 libavcodec/vdpau_vc1.c diff --git a/configure b/configure index c62ea2d803..a2bf6e186a 100755 --- a/configure +++ b/configure @@ -1623,9 +1623,11 @@ vc1_dxva2_hwaccel_deps="dxva2api_h" vc1_dxva2_hwaccel_select="dxva2 vc1_decoder" vc1_vaapi_hwaccel_select="vaapi vc1_decoder" vc1_vdpau_decoder_select="vdpau vc1_decoder" +vc1_vdpau_hwaccel_select="vdpau vc1_decoder" wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel" wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel" wmv3_vdpau_decoder_select="vc1_vdpau_decoder" +wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel" # parsers h264_parser_select="error_resilience golomb h264dsp h264pred mpegvideo" diff --git a/libavcodec/Makefile b/libavcodec/Makefile index 3f5b938cfc..1001c2d407 100644 --- a/libavcodec/Makefile +++ b/libavcodec/Makefile @@ -383,6 +383,7 @@ OBJS-$(CONFIG_VC1_DECODER) += vc1dec.o vc1.o vc1data.o vc1dsp.o \ intrax8.o intrax8dsp.o OBJS-$(CONFIG_VC1_DXVA2_HWACCEL) += dxva2_vc1.o OBJS-$(CONFIG_VC1_VAAPI_HWACCEL) += vaapi_vc1.o +OBJS-$(CONFIG_VC1_VDPAU_HWACCEL) += vdpau_vc1.o OBJS-$(CONFIG_VCR1_DECODER) += vcr1.o OBJS-$(CONFIG_VCR1_ENCODER) += vcr1.o OBJS-$(CONFIG_VMDAUDIO_DECODER) += vmdav.o diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c index ac8119a3d5..4622a03491 100644 --- a/libavcodec/allcodecs.c +++ b/libavcodec/allcodecs.c @@ -87,8 +87,10 @@ void avcodec_register_all(void) REGISTER_HWACCEL(MPEG4_VDPAU, mpeg4_vdpau); REGISTER_HWACCEL(VC1_DXVA2, vc1_dxva2); REGISTER_HWACCEL(VC1_VAAPI, vc1_vaapi); + REGISTER_HWACCEL(VC1_VDPAU, vc1_vdpau); REGISTER_HWACCEL(WMV3_DXVA2, wmv3_dxva2); REGISTER_HWACCEL(WMV3_VAAPI, wmv3_vaapi); + REGISTER_HWACCEL(WMV3_VDPAU, wmv3_vdpau); /* video codecs */ REGISTER_ENCODER(A64MULTI, a64multi); diff --git a/libavcodec/vdpau_vc1.c b/libavcodec/vdpau_vc1.c new file mode 100644 index 0000000000..638c07a607 --- /dev/null +++ b/libavcodec/vdpau_vc1.c @@ -0,0 +1,128 @@ +/* + * VC-1 decode acceleration through VDPAU + * + * Copyright (c) 2008 NVIDIA + * Copyright (c) 2013 Rémi Denis-Courmont + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#include "avcodec.h" +#include "vc1.h" +#include "vdpau.h" +#include "vdpau_internal.h" + +static int vdpau_vc1_start_frame(AVCodecContext *avctx, + const uint8_t *buffer, uint32_t size) +{ + VC1Context * const v = avctx->priv_data; + AVVDPAUContext *hwctx = avctx->hwaccel_context; + MpegEncContext * const s = &v->s; + VdpPictureInfoVC1 *info = &hwctx->info.vc1; + VdpVideoSurface ref; + + /* fill LvPictureInfoVC1 struct */ + info->forward_reference = VDP_INVALID_HANDLE; + info->backward_reference = VDP_INVALID_HANDLE; + + switch (s->pict_type) { + case AV_PICTURE_TYPE_B: + ref = ff_vdpau_get_surface_id(&s->next_picture); + assert(ref != VDP_INVALID_HANDLE); + info->backward_reference = ref; + /* fall-through */ + case AV_PICTURE_TYPE_P: + ref = ff_vdpau_get_surface_id(&s->last_picture); + assert(ref != VDP_INVALID_HANDLE); + info->forward_reference = ref; + } + + info->slice_count = 0; + if (v->bi_type) + info->picture_type = 4; + else + info->picture_type = s->pict_type - 1 + s->pict_type / 3; + + info->frame_coding_mode = v->fcm; + info->postprocflag = v->postprocflag; + info->pulldown = v->broadcast; + info->interlace = v->interlace; + info->tfcntrflag = v->tfcntrflag; + info->finterpflag = v->finterpflag; + info->psf = v->psf; + info->dquant = v->dquant; + info->panscan_flag = v->panscanflag; + info->refdist_flag = v->refdist_flag; + info->quantizer = v->quantizer_mode; + info->extended_mv = v->extended_mv; + info->extended_dmv = v->extended_dmv; + info->overlap = v->overlap; + info->vstransform = v->vstransform; + info->loopfilter = v->s.loop_filter; + info->fastuvmc = v->fastuvmc; + info->range_mapy_flag = v->range_mapy_flag; + info->range_mapy = v->range_mapy; + info->range_mapuv_flag = v->range_mapuv_flag; + info->range_mapuv = v->range_mapuv; + /* Specific to simple/main profile only */ + info->multires = v->multires; + info->syncmarker = v->s.resync_marker; + info->rangered = v->rangered | (v->rangeredfrm << 1); + info->maxbframes = v->s.max_b_frames; + info->deblockEnable = v->postprocflag & 1; + info->pquant = v->pq; + + return ff_vdpau_common_start_frame(avctx, buffer, size); +} + +static int vdpau_vc1_decode_slice(AVCodecContext *avctx, + const uint8_t *buffer, uint32_t size) +{ + AVVDPAUContext *hwctx = avctx->hwaccel_context; + int val; + + val = ff_vdpau_add_buffer(avctx, buffer, size); + if (val < 0) + return val; + + hwctx->info.vc1.slice_count++; + return 0; +} + +#if CONFIG_WMV3_VDPAU_HWACCEL +AVHWAccel ff_wmv3_vdpau_hwaccel = { + .name = "wm3_vdpau", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_WMV3, + .pix_fmt = AV_PIX_FMT_VDPAU, + .start_frame = vdpau_vc1_start_frame, + .end_frame = ff_vdpau_common_end_frame, + .decode_slice = vdpau_vc1_decode_slice, +}; +#endif + +AVHWAccel ff_vc1_vdpau_hwaccel = { + .name = "vc1_vdpau", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_VC1, + .pix_fmt = AV_PIX_FMT_VDPAU, + .start_frame = vdpau_vc1_start_frame, + .end_frame = ff_vdpau_common_end_frame, + .decode_slice = vdpau_vc1_decode_slice, +}; diff --git a/libavcodec/version.h b/libavcodec/version.h index 54e6179e7f..c497edb075 100644 --- a/libavcodec/version.h +++ b/libavcodec/version.h @@ -27,7 +27,7 @@ */ #define LIBAVCODEC_VERSION_MAJOR 54 -#define LIBAVCODEC_VERSION_MINOR 39 +#define LIBAVCODEC_VERSION_MINOR 40 #define LIBAVCODEC_VERSION_MICRO 0 #define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \ From 246da0b13551b1f80f067e4f258e5bd691f5ab33 Mon Sep 17 00:00:00 2001 From: Anton Khirnov Date: Mon, 7 Jan 2013 18:35:48 +0100 Subject: [PATCH 3/3] v4l2: avoid pointless indirection. v4l2_read_header() does no cleanup, so it can return directly, without any need for goto. --- libavdevice/v4l2.c | 35 +++++++++++++---------------------- 1 file changed, 13 insertions(+), 22 deletions(-) diff --git a/libavdevice/v4l2.c b/libavdevice/v4l2.c index 9e71f1d8c8..fd2ab385c0 100644 --- a/libavdevice/v4l2.c +++ b/libavdevice/v4l2.c @@ -687,21 +687,16 @@ static int v4l2_read_header(AVFormatContext *s1) enum AVPixelFormat pix_fmt = AV_PIX_FMT_NONE; st = avformat_new_stream(s1, NULL); - if (!st) { - res = AVERROR(ENOMEM); - goto out; - } + if (!st) + return AVERROR(ENOMEM); s->fd = device_open(s1); - if (s->fd < 0) { - res = s->fd; - goto out; - } + if (s->fd < 0) + return s->fd; if (s->list_format) { list_formats(s1, s->fd, s->list_format); - res = AVERROR_EXIT; - goto out; + return AVERROR_EXIT; } avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */ @@ -710,7 +705,7 @@ static int v4l2_read_header(AVFormatContext *s1) (res = av_parse_video_size(&s->width, &s->height, s->video_size)) < 0) { av_log(s1, AV_LOG_ERROR, "Could not parse video size '%s'.\n", s->video_size); - goto out; + return res; } if (s->pixel_format) { @@ -725,8 +720,7 @@ static int v4l2_read_header(AVFormatContext *s1) av_log(s1, AV_LOG_ERROR, "No such input format: %s.\n", s->pixel_format); - res = AVERROR(EINVAL); - goto out; + return AVERROR(EINVAL); } } @@ -739,8 +733,7 @@ static int v4l2_read_header(AVFormatContext *s1) if (ioctl(s->fd, VIDIOC_G_FMT, &fmt) < 0) { av_log(s1, AV_LOG_ERROR, "ioctl(VIDIOC_G_FMT): %s\n", strerror(errno)); - res = AVERROR(errno); - goto out; + return AVERROR(errno); } s->width = fmt.fmt.pix.width; @@ -756,17 +749,16 @@ static int v4l2_read_header(AVFormatContext *s1) "codec_id %d, pix_fmt %d.\n", s1->video_codec_id, pix_fmt); close(s->fd); - res = AVERROR(EIO); - goto out; + return AVERROR(EIO); } if ((res = av_image_check_size(s->width, s->height, 0, s1) < 0)) - goto out; + return res; s->frame_format = desired_format; if ((res = v4l2_set_parameters(s1) < 0)) - goto out; + return res; st->codec->pix_fmt = fmt_v4l2ff(desired_format, codec_id); s->frame_size = @@ -775,7 +767,7 @@ static int v4l2_read_header(AVFormatContext *s1) if ((res = mmap_init(s1)) || (res = mmap_start(s1)) < 0) { close(s->fd); - goto out; + return res; } s->top_field_first = first_field(s->fd); @@ -789,8 +781,7 @@ static int v4l2_read_header(AVFormatContext *s1) st->codec->height = s->height; st->codec->bit_rate = s->frame_size * 1/av_q2d(st->codec->time_base) * 8; -out: - return res; + return 0; } static int v4l2_read_packet(AVFormatContext *s1, AVPacket *pkt)