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codec.c
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///
/// @file codec.c @brief Codec functions
///
/// Copyright (c) 2009 - 2015 by Johns. All Rights Reserved.
///
/// Contributor(s):
///
/// License: AGPLv3
///
/// This program is free software: you can redistribute it and/or modify
/// it under the terms of the GNU Affero General Public License as
/// published by the Free Software Foundation, either version 3 of the
/// License.
///
/// This program 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 Affero General Public License for more details.
///
/// $Id$
//////////////////////////////////////////////////////////////////////////////
///
/// @defgroup Codec The codec module.
///
/// This module contains all decoder and codec functions.
/// It is uses ffmpeg (http://ffmpeg.org) as backend.
///
/// It may work with libav (http://libav.org), but the tests show
/// many bugs and incompatiblity in it. Don't use this shit.
///
/// compile with pass-through support (stable, AC-3, E-AC-3 only)
#define USE_PASSTHROUGH
/// compile audio drift correction support (very experimental)
#define USE_AUDIO_DRIFT_CORRECTION
/// compile AC-3 audio drift correction support (very experimental)
#define USE_AC3_DRIFT_CORRECTION
/// use ffmpeg libswresample API (autodected, Makefile)
#define noUSE_SWRESAMPLE
/// use libav libavresample API (autodected, Makefile)
#define noUSE_AVRESAMPLE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#ifdef __FreeBSD__
#include <sys/endian.h>
#else
#include <endian.h>
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <libintl.h>
#define _(str) gettext(str) ///< gettext shortcut
#define _N(str) str ///< gettext_noop shortcut
#include <libavcodec/avcodec.h>
#include <libavutil/mem.h>
#include <libavutil/pixdesc.h>
// support old ffmpeg versions <1.0
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(55,18,102)
#define AVCodecID CodecID
#define AV_CODEC_ID_MP2 CODEC_ID_MP2
#define AV_CODEC_ID_AC3 CODEC_ID_AC3
#define AV_CODEC_ID_EAC3 CODEC_ID_EAC3
#define AV_CODEC_ID_DTS CODEC_ID_DTS
#define AV_CODEC_ID_MPEG2VIDEO CODEC_ID_MPEG2VIDEO
#define AV_CODEC_ID_H264 CODEC_ID_H264
#endif
#ifdef USE_VAAPI
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(57,74,100)
#include <libavcodec/vaapi.h>
#endif
#endif
#ifdef USE_VDPAU
#include <libavcodec/vdpau.h>
#endif
#ifdef USE_SWRESAMPLE
#include <libswresample/swresample.h>
#endif
#ifdef USE_AVRESAMPLE
#include <libavresample/avresample.h>
#endif
#ifdef USE_AVFILTER
#include <libavfilter/avfilter.h>
#include <libavfilter/buffersink.h>
#include <libavfilter/buffersrc.h>
#endif
#include <libavutil/opt.h>
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(58,7,100)
#define CODEC_CAP_HWACCEL_VDPAU AV_CODEC_CAP_HWACCEL_VDPAU
#define CODEC_CAP_TRUNCATED AV_CODEC_CAP_TRUNCATED
#define CODEC_CAP_DR1 AV_CODEC_CAP_DR1
#define CODEC_CAP_FRAME_THREADS AV_CODEC_CAP_FRAME_THREADS
#endif
#ifndef __USE_GNU
#define __USE_GNU
#endif
#include <pthread.h>
#include "iatomic.h"
#include "misc.h"
#include "video.h"
#include "audio.h"
#include "codec.h"
//----------------------------------------------------------------------------
// correct is AV_VERSION_INT(56,35,101) but some gentoo i* think
// they must change it.
#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(56,26,100) && LIBAVCODEC_VERSION_INT < AV_VERSION_INT(56,60,100)
/// ffmpeg 2.6 started to show artifacts after channel switch
/// to SDTV channels
#define FFMPEG_WORKAROUND_ARTIFACTS 1
#endif
/// artifacts with VDPAU when codec flushed
#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(58,10,100)
#define FFMPEG_4_WORKAROUND_ARTIFACTS 1
#endif
//----------------------------------------------------------------------------
// Global
//----------------------------------------------------------------------------
///
/// ffmpeg lock mutex
///
/// new ffmpeg dislikes simultanous open/close
/// this breaks our code, until this is fixed use lock.
///
static pthread_mutex_t CodecLockMutex;
/// Flag prefer fast channel switch
char CodecUsePossibleDefectFrames;
//----------------------------------------------------------------------------
// Video
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
// Call-backs
//----------------------------------------------------------------------------
/**
** Callback to negotiate the PixelFormat.
**
** @param video_ctx codec context
** @param fmt is the list of formats which are supported by
** the codec, it is terminated by -1 as 0 is a
** valid format, the formats are ordered by
** quality.
*/
static enum AVPixelFormat Codec_get_format(AVCodecContext * video_ctx,
const enum AVPixelFormat *fmt)
{
VideoDecoder *decoder;
decoder = video_ctx->opaque;
#if LIBAVCODEC_VERSION_INT == AV_VERSION_INT(54,86,100)
// this begins to stink, 1.1.2 calls get_format for each frame
// 1.1.3 has the same version, but works again
if (decoder->GetFormatDone) {
if (decoder->GetFormatDone < 10) {
++decoder->GetFormatDone;
Error
("codec/video: ffmpeg/libav buggy: get_format called again\n");
}
return *fmt; // FIXME: this is hack
}
#endif
// bug in ffmpeg 1.1.1, called with zero width or height
if (!video_ctx->width || !video_ctx->height) {
Error("codec/video: ffmpeg/libav buggy: width or height zero\n");
}
return Video_get_format(decoder->HwDecoder, video_ctx, fmt);
}
static void Codec_free_buffer(void *opaque, uint8_t *data);
/**
** Video buffer management, get buffer for frame.
**
** Called at the beginning of each frame to get a buffer for it.
**
** @param video_ctx Codec context
** @param frame Get buffer for this frame
*/
static int Codec_get_buffer2(AVCodecContext * video_ctx, AVFrame * frame, int flags)
{
VideoDecoder *decoder;
decoder = video_ctx->opaque;
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(54,86,100)
// ffmpeg has this already fixed
// libav 0.8.5 53.35.0 still needs this
#endif
if (!decoder->GetFormatDone) { // get_format missing
enum AVPixelFormat fmts[2];
fprintf(stderr, "codec: buggy libav, use ffmpeg\n");
Warning(_("codec: buggy libav, use ffmpeg\n"));
fmts[0] = video_ctx->pix_fmt;
fmts[1] = AV_PIX_FMT_NONE;
Codec_get_format(video_ctx, fmts);
}
#ifdef USE_VDPAU
#if LIBAVUTIL_VERSION_MAJOR < 56
// VDPAU: AV_PIX_FMT_VDPAU_H264 .. AV_PIX_FMT_VDPAU_VC1 AV_PIX_FMT_VDPAU_MPEG4
if ((AV_PIX_FMT_VDPAU_H264 <= video_ctx->pix_fmt
&& video_ctx->pix_fmt <= AV_PIX_FMT_VDPAU_VC1)
|| video_ctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG4) {
unsigned surface;
struct vdpau_render_state *vrs;
surface = VideoGetSurface(decoder->HwDecoder, video_ctx);
vrs = av_mallocz(sizeof(struct vdpau_render_state));
vrs->surface = surface;
//Debug(3, "codec: use surface %#010x\n", surface);
// render
frame->buf[0] = av_buffer_create((uint8_t*)vrs, 0, Codec_free_buffer, video_ctx, 0);
frame->data[0] = frame->buf[0]->data;
frame->data[1] = NULL;
frame->data[2] = NULL;
frame->data[3] = NULL;
return 0;
}
#endif
#endif
// VA-API and new VDPAU:
if (video_ctx->hw_frames_ctx || video_ctx->hwaccel_context) {
unsigned surface;
surface = VideoGetSurface(decoder->HwDecoder, video_ctx);
//Debug(3, "codec: use surface %#010x\n", surface);
#if LIBAVUTIL_VERSION_INT < AV_VERSION_INT(52,48,101)
frame->type = FF_BUFFER_TYPE_USER;
#endif
#if LIBAVCODEC_VERSION_INT <= AV_VERSION_INT(53,46,0)
frame->age = 256 * 256 * 256 * 64;
#endif
// vaapi needs both fields set
frame->buf[0] = av_buffer_create((uint8_t*)(size_t)surface, 0, Codec_free_buffer, video_ctx, 0);
frame->data[0] = frame->buf[0]->data;
frame->data[3] = frame->data[0];
#if LIBAVUTIL_VERSION_INT < AV_VERSION_INT(52,66,100)
// reordered frames
if (video_ctx->pkt) {
frame->pkt_pts = video_ctx->pkt->pts;
} else {
frame->pkt_pts = AV_NOPTS_VALUE;
}
#endif
return 0;
}
//Debug(3, "codec: fallback to default get_buffer\n");
return avcodec_default_get_buffer2(video_ctx, frame, flags);
}
/**
** Video buffer management, release buffer for frame.
** Called to release buffers which were allocated with get_buffer.
**
** @param opaque opaque data
** @param data buffer data
*/
static void Codec_free_buffer(void *opaque, uint8_t *data)
{
AVCodecContext *video_ctx = (AVCodecContext *)opaque;
#ifdef USE_VDPAU
#if LIBAVUTIL_VERSION_MAJOR < 56
// VDPAU: AV_PIX_FMT_VDPAU_H264 .. AV_PIX_FMT_VDPAU_VC1 AV_PIX_FMT_VDPAU_MPEG4
if ((AV_PIX_FMT_VDPAU_H264 <= video_ctx->pix_fmt
&& video_ctx->pix_fmt <= AV_PIX_FMT_VDPAU_VC1)
|| video_ctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG4) {
VideoDecoder *decoder;
struct vdpau_render_state *vrs;
unsigned surface;
decoder = video_ctx->opaque;
vrs = (struct vdpau_render_state *)data;
surface = vrs->surface;
//Debug(3, "codec: release surface %#010x\n", surface);
VideoReleaseSurface(decoder->HwDecoder, surface);
av_freep(&vrs->bitstream_buffers);
vrs->bitstream_buffers_allocated = 0;
av_freep(&data);
return;
}
#endif
#endif
// VA-API and new VDPAU
if (video_ctx->hw_frames_ctx || video_ctx->hwaccel_context) {
VideoDecoder *decoder;
unsigned surface;
decoder = video_ctx->opaque;
surface = (unsigned)(size_t) data;
//Debug(3, "codec: release surface %#010x\n", surface);
VideoReleaseSurface(decoder->HwDecoder, surface);
return;
}
}
/// libav: compatibility hack
#ifndef AV_NUM_DATA_POINTERS
#define AV_NUM_DATA_POINTERS 4
#endif
/**
** Draw a horizontal band.
**
** @param video_ctx Codec context
** @param frame draw this frame
** @param y y position of slice
** @param type 1->top field, 2->bottom field, 3->frame
** @param offset offset into AVFrame.data from which slice
** should be read
** @param height height of slice
*/
static void Codec_draw_horiz_band(AVCodecContext * video_ctx,
const AVFrame * frame, __attribute__ ((unused))
int offset[AV_NUM_DATA_POINTERS], __attribute__ ((unused))
int y, __attribute__ ((unused))
int type, __attribute__ ((unused))
int height)
{
(void)video_ctx;
(void)frame;
#ifdef USE_VDPAU
#if LIBAVUTIL_VERSION_MAJOR < 56
// VDPAU: AV_PIX_FMT_VDPAU_H264 .. AV_PIX_FMT_VDPAU_VC1 AV_PIX_FMT_VDPAU_MPEG4
if ((AV_PIX_FMT_VDPAU_H264 <= video_ctx->pix_fmt
&& video_ctx->pix_fmt <= AV_PIX_FMT_VDPAU_VC1)
|| video_ctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG4) {
VideoDecoder *decoder;
struct vdpau_render_state *vrs;
//unsigned surface;
decoder = video_ctx->opaque;
vrs = (struct vdpau_render_state *)frame->data[0];
//surface = vrs->surface;
//Debug(3, "codec: draw slice surface %#010x\n", surface);
//Debug(3, "codec: %d references\n", vrs->info.h264.num_ref_frames);
VideoDrawRenderState(decoder->HwDecoder, vrs);
return;
}
#endif
#endif
}
//----------------------------------------------------------------------------
// Test
//----------------------------------------------------------------------------
/**
** Allocate a new video decoder context.
**
** @param hw_decoder video hardware decoder
**
** @returns private decoder pointer for video decoder.
*/
VideoDecoder *CodecVideoNewDecoder(VideoHwDecoder * hw_decoder)
{
VideoDecoder *decoder;
if (!(decoder = calloc(1, sizeof(*decoder)))) {
Fatal(_("codec: can't allocate vodeo decoder\n"));
}
decoder->HwDecoder = hw_decoder;
return decoder;
}
/**
** Deallocate a video decoder context.
**
** @param decoder private video decoder
*/
void CodecVideoDelDecoder(VideoDecoder * decoder)
{
free(decoder);
}
#ifdef USE_AVFILTER
/**
** Init video filter.
**
** @param decoder private video decoder
** @param hardware enable hardware filter
*/
int CodecVideoInitFilter(VideoDecoder * decoder, const char *filter_descr)
{
char args[512];
int ret = 0;
const AVFilter *buffersrc = avfilter_get_by_name("buffer");
const AVFilter *buffersink = avfilter_get_by_name("buffersink");
AVFilterInOut *outputs = avfilter_inout_alloc();
AVFilterInOut *inputs = avfilter_inout_alloc();
#if LIBAVUTIL_VERSION_INT < AV_VERSION_INT(59,40,100)
enum AVPixelFormat pix_fmts[] = { decoder->VideoCtx->pix_fmt, AV_PIX_FMT_NONE };
#endif
if (!filter_descr) {
Error(_("codec: filter not described, filter disabled\n"));
ret = -1;
goto end;
}
// free filter if hardware decoder failed
if (decoder->filter_graph) {
avfilter_graph_free(&decoder->filter_graph);
}
decoder->filter_graph = avfilter_graph_alloc();
if (!outputs || !inputs || !decoder->filter_graph) {
ret = AVERROR(ENOMEM);
goto end;
}
#if LIBAVFILTER_VERSION_INT < AV_VERSION_INT(9,16,100)
snprintf(args, sizeof(args), "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d",
decoder->VideoCtx->width, decoder->VideoCtx->height, decoder->VideoCtx->pix_fmt,
decoder->VideoCtx->pkt_timebase.num, decoder->VideoCtx->pkt_timebase.den,
decoder->VideoCtx->sample_aspect_ratio.num, decoder->VideoCtx->sample_aspect_ratio.den);
#else
snprintf(args, sizeof(args), "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d:colorspace=%d:range=%d",
decoder->VideoCtx->width, decoder->VideoCtx->height, decoder->VideoCtx->pix_fmt,
decoder->VideoCtx->pkt_timebase.num, decoder->VideoCtx->pkt_timebase.den,
decoder->VideoCtx->sample_aspect_ratio.num, decoder->VideoCtx->sample_aspect_ratio.den,
decoder->VideoCtx->colorspace,decoder->VideoCtx->color_range);
#endif
Debug(3,"codec: filter %s init args: %s\n", filter_descr, args);
decoder->buffersrc_ctx = avfilter_graph_alloc_filter(decoder->filter_graph, buffersrc, "in");
if (!decoder->buffersrc_ctx) {
Error(_("Cannot alloc buffer source %s\n"), args);
goto end;
}
if (decoder->active_hwaccel_id != HWACCEL_NONE) {
AVBufferSrcParameters *params = av_buffersrc_parameters_alloc();
if (!params) goto end;
params->hw_frames_ctx = decoder->VideoCtx->hw_frames_ctx;
ret = av_buffersrc_parameters_set(decoder->buffersrc_ctx, params);
av_free(params);
if (ret < 0) {
Debug(3, "Cannot set hw_frames_ctx to src\n");
goto end;
}
}
ret = avfilter_init_str(decoder->buffersrc_ctx, args);
if (ret < 0) {
Error(_("Cannot init buffer source %s\n"), args);
goto end;
}
ret = avfilter_graph_create_filter(&decoder->buffersink_ctx, buffersink, "out",
NULL, NULL, decoder->filter_graph);
if (ret < 0) {
Error(_("codec: cannot create buffer sink\n"));
goto end;
}
#if LIBAVUTIL_VERSION_INT < AV_VERSION_INT(59,40,100)
ret = av_opt_set_int_list(decoder->buffersink_ctx, "pix_fmts", pix_fmts,
AV_PIX_FMT_NONE, AV_OPT_SEARCH_CHILDREN);
if (ret < 0) {
Error(_("codec: cannot set output pixel format\n"));
goto end;
}
#endif
outputs->name = av_strdup("in");
outputs->filter_ctx = decoder->buffersrc_ctx;
outputs->pad_idx = 0;
outputs->next = NULL;
inputs->name = av_strdup("out");
inputs->filter_ctx = decoder->buffersink_ctx;
inputs->pad_idx = 0;
inputs->next = NULL;
ret = avfilter_graph_parse_ptr(decoder->filter_graph, filter_descr, &inputs, &outputs, NULL);
if (ret < 0) {
Error(_("codec: cannot parse ptr filter graph\n"));
goto end;
}
ret = avfilter_graph_config(decoder->filter_graph, NULL);
if (ret < 0) {
Error(_("codec: cannot config filter graph %d\n"),ret);
goto end;
}
#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(56,28,1)
if (!(decoder->Filt_Frame = av_frame_alloc())) {
Error(_("codec: can't allocate video filter frame buffer\n"));
ret = -1;
goto end;
}
#else
if (!(decoder->Filt_Frame = avcodec_alloc_frame())) {
Error(_("codec: can't allocate video filter frame buffer\n"));
ret = -1;
goto end;
}
#endif
end:
avfilter_inout_free(&inputs);
avfilter_inout_free(&outputs);
if (ret < 0)
avfilter_graph_free(&decoder->filter_graph);
return ret;
}
#endif
/**
** Open video decoder.
**
** @param decoder private video decoder
** @param codec_id video codec id
*/
int CodecVideoOpen(VideoDecoder * decoder, int codec_id)
{
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(59,0,100)
AVCodec *video_codec;
#else
const AVCodec *video_codec;
#endif
const char *name;
#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(58,10,100)
AVCodecParserContext *parser = NULL;
#endif
Debug(3, "codec: using video codec ID %#06x (%s)\n", codec_id,
avcodec_get_name(codec_id));
if (decoder->VideoCtx) {
Error(_("codec: missing close\n"));
}
name = NULL;
if (VideoIsDriverVdpau()) {
switch (codec_id) {
case AV_CODEC_ID_MPEG2VIDEO:
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(57,89,100)
name = VideoHardwareDecoder > HWmpeg2Off ? "mpegvideo_vdpau" : NULL;
#else
name = VideoHardwareDecoder > HWmpeg2Off ? "mpeg2video" : NULL;
#endif
break;
case AV_CODEC_ID_H264:
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(57,89,100)
name = VideoHardwareDecoder ? "h264_vdpau" : NULL;
#else
name = VideoHardwareDecoder ? "h264" : NULL;
#endif
break;
case AV_CODEC_ID_HEVC:
#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(57,89,100)
name = VideoHardwareDecoder > HWhevcOff? "hevc" : NULL; //Nvidia fix vdpau hevc in 4xx driver, Radeon can vdpau hevc
#endif
break;
}
}
if (VideoIsDriverCuvid()) {
switch (codec_id) {
case AV_CODEC_ID_MPEG2VIDEO:
name = VideoHardwareDecoder > HWmpeg2Off ? "mpeg2_cuvid" : NULL;
break;
case AV_CODEC_ID_H264:
name = VideoHardwareDecoder ? "h264_cuvid" : NULL;
break;
case AV_CODEC_ID_HEVC:
name = VideoHardwareDecoder ? "hevc_cuvid" : NULL;
break;
}
}
if (name && (video_codec = avcodec_find_decoder_by_name(name))) {
Debug(3, "codec: hw decoder found\n");
} else if (!(video_codec = avcodec_find_decoder(codec_id))) {
Error(_("codec: codec ID %#06x not found\n"), codec_id);
return 0;
}
decoder->VideoCodec = video_codec;
#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(58,10,100)
if (!VideoIsDriverCuvid() && codec_id == AV_CODEC_ID_MPEG2VIDEO) {
parser = av_parser_init(codec_id);
if (!parser)
Error(_("codec: can't init parser\n"));
}
decoder->parser = parser;
#endif
if (!(decoder->VideoCtx = avcodec_alloc_context3(video_codec))) {
Error(_("codec: can't allocate video codec context\n"));
decoder->VideoCodec = NULL;
return 0;
}
// FIXME: for software decoder use all cpus, otherwise 1
decoder->VideoCtx->thread_count = 1;
decoder->VideoCtx->pkt_timebase.num = 1;
decoder->VideoCtx->pkt_timebase.den = 90000;
#if LIBAVCODEC_VERSION_INT <= AV_VERSION_INT(60,16,101)
if (strstr(decoder->VideoCodec->name, "cuvid"))
av_opt_set_int(decoder->VideoCtx->priv_data, "surfaces", codec_id == AV_CODEC_ID_MPEG2VIDEO ? 10 : 21, 0);
#else
decoder->VideoCtx->extra_hw_frames = 5;
#endif
pthread_mutex_lock(&CodecLockMutex);
// open codec
#if LIBAVCODEC_VERSION_INT <= AV_VERSION_INT(53,5,0)
if (avcodec_open(decoder->VideoCtx, video_codec) < 0) {
pthread_mutex_unlock(&CodecLockMutex);
Error(_("codec: can't open video codec!\n"));
decoder->VideoCodec = NULL;
return 0;
}
#else
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(58,00,100)
if (video_codec->capabilities & (AV_CODEC_CAP_HWACCEL_VDPAU |
CODEC_CAP_HWACCEL)) {
Debug(3, "codec: video mpeg hack active\n");
// HACK around badly placed checks in mpeg_mc_decode_init
// taken from mplayer vd_ffmpeg.c
decoder->VideoCtx->slice_flags =
SLICE_FLAG_CODED_ORDER | SLICE_FLAG_ALLOW_FIELD;
decoder->VideoCtx->active_thread_type = 0;
}
#endif
if (avcodec_open2(decoder->VideoCtx, video_codec, NULL) < 0) {
pthread_mutex_unlock(&CodecLockMutex);
Error(_("codec: can't open video codec!\n"));
decoder->VideoCodec = NULL;
return 0;
}
#endif
pthread_mutex_unlock(&CodecLockMutex);
decoder->VideoCtx->opaque = decoder; // our structure
Debug(3, "codec: video '%s'\n", decoder->VideoCodec->long_name);
// if (codec_id == AV_CODEC_ID_H264) {
// 2.53 Ghz CPU is too slow for this codec at 1080i
//decoder->VideoCtx->skip_loop_filter = AVDISCARD_ALL;
//decoder->VideoCtx->skip_loop_filter = AVDISCARD_BIDIR;
// }
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(59,8,100)
if (video_codec->capabilities & AV_CODEC_CAP_TRUNCATED) {
Debug(3, "codec: video can use truncated packets\n");
//#ifndef USE_MPEG_COMPLETE
// we send incomplete frames, for old PES recordings
// this breaks the decoder for some stations
decoder->VideoCtx->flags |= AV_CODEC_FLAG_TRUNCATED;
//#endif
}
#endif
#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(59,55,100)
if (VideoIsDriverNVdec()) {
decoder->VideoCtx->hwaccel_flags |= AV_HWACCEL_FLAG_UNSAFE_OUTPUT;
}
#endif
// FIXME: own memory management for video frames.
if (video_codec->capabilities & AV_CODEC_CAP_DR1) {
Debug(3, "codec: can use own buffer management\n");
}
#ifdef CODEC_CAP_FRAME_THREADS
if (video_codec->capabilities & AV_CODEC_CAP_FRAME_THREADS) {
Debug(3, "codec: codec supports frame threads\n");
}
#endif
//decoder->VideoCtx->debug = FF_DEBUG_STARTCODE;
//decoder->VideoCtx->err_recognition |= AV_EF_EXPLODE;
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(58,00,100)
if ((video_codec->capabilities & (AV_CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_HWACCEL)) &&
#else
if (avcodec_get_hw_config(video_codec, 0) &&
#endif
VideoHardwareDecoder && !(codec_id == AV_CODEC_ID_MPEG2VIDEO
&& VideoHardwareDecoder == HWmpeg2Off) && !VideoIsDriverCpu()) {
Debug(3, "codec: can export data for HW decoding\n");
// FIXME: get_format never called.
decoder->VideoCtx->get_format = Codec_get_format;
if (!VideoIsDriverNVdec())
decoder->VideoCtx->get_buffer2 = Codec_get_buffer2;
decoder->VideoCtx->draw_horiz_band = Codec_draw_horiz_band;
decoder->VideoCtx->thread_count = 1;
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(58,114,100)
decoder->VideoCtx->thread_safe_callbacks = 0;
#endif
decoder->VideoCtx->active_thread_type = 0;
decoder->VideoCtx->hwaccel_context =
VideoGetHwAccelContext(decoder->HwDecoder);
} else {
Debug(3, "codec: use SW decoding\n");
decoder->VideoCtx->get_format = Codec_get_format;
decoder->VideoCtx->get_buffer2 = Codec_get_buffer2;
decoder->VideoCtx->thread_count = 0;
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(58,114,100)
decoder->VideoCtx->thread_safe_callbacks = 1;
#endif
decoder->VideoCtx->active_thread_type = 0;
decoder->VideoCtx->draw_horiz_band = NULL;
decoder->VideoCtx->hwaccel_context = NULL;
decoder->hwaccel_pix_fmt = AV_PIX_FMT_NONE;
decoder->active_hwaccel_id = HWACCEL_NONE;
}
//
// Prepare frame buffer for decoder
//
#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(56,28,1)
if (!(decoder->Frame = av_frame_alloc())) {
Error(_("codec: can't allocate video decoder frame buffer\n"));
return 0;
}
#else
if (!(decoder->Frame = avcodec_alloc_frame())) {
Error(_("codec: can't allocate video decoder frame buffer\n"));
return 0;
}
#endif
// reset buggy ffmpeg/libav flag
decoder->GetFormatDone = 0;
#if defined FFMPEG_WORKAROUND_ARTIFACTS || defined FFMPEG_4_WORKAROUND_ARTIFACTS
decoder->FirstKeyFrame = 1;
#endif
return 1;
}
/**
** Close video decoder.
**
** @param video_decoder private video decoder
*/
void CodecVideoClose(VideoDecoder * video_decoder)
{
Debug(3, "codec: video codec close\n");
// FIXME: play buffered data
#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(56,28,1)
av_frame_free(&video_decoder->Frame); // callee does checks
#else
av_freep(&video_decoder->Frame);
#endif
#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(58,10,100)
if(video_decoder->parser) {
av_parser_close(video_decoder->parser);
video_decoder->parser = NULL;
}
#endif
if (video_decoder->VideoCtx) {
if (VideoIsDriverCuvid() || VideoIsDriverNVdec())
VideoUnregisterSurface(video_decoder->HwDecoder);
pthread_mutex_lock(&CodecLockMutex);
#ifdef USE_AVFILTER
#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(56,28,1)
av_frame_free(&video_decoder->Filt_Frame);
#else
av_freep(&video_decoder->Filt_Frame);
#endif
if (video_decoder->filter_graph) {
avfilter_graph_free(&video_decoder->filter_graph);
video_decoder->filter_graph = NULL;
}
#endif
#if LIBAVUTIL_VERSION_INT < AV_VERSION_INT(55,63,100)
avcodec_close(video_decoder->VideoCtx);
av_freep(&video_decoder->VideoCtx);
#else
avcodec_free_context(&video_decoder->VideoCtx);
#endif
pthread_mutex_unlock(&CodecLockMutex);
}
}
#if 0
/**
** Display pts...
**
** ffmpeg-0.9 pts always AV_NOPTS_VALUE
** ffmpeg-0.9 pkt_pts nice monotonic (only with HD)
** ffmpeg-0.9 pkt_dts wild jumping -160 - 340 ms
**
** libav 0.8_pre20111116 pts always AV_NOPTS_VALUE
** libav 0.8_pre20111116 pkt_pts always 0 (could be fixed?)
** libav 0.8_pre20111116 pkt_dts wild jumping -160 - 340 ms
*/
void DisplayPts(AVCodecContext * video_ctx, AVFrame * frame)
{
int ms_delay;
int64_t pts;
static int64_t last_pts;
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(57,61,100)
pts = frame->pkt_pts;
#else
pts = frame->pts;
#endif
if (pts == (int64_t) AV_NOPTS_VALUE) {
printf("*");
}
ms_delay = (1000 * video_ctx->time_base.num) / video_ctx->time_base.den;
ms_delay += frame->repeat_pict * ms_delay / 2;
printf("codec: PTS %s%s %" PRId64 " %d %d/%d %dms\n",
frame->repeat_pict ? "r" : " ", frame->interlaced_frame ? "I" : " ",
pts, (int)(pts - last_pts) / 90, video_ctx->time_base.num,
video_ctx->time_base.den, ms_delay);
if (pts != (int64_t) AV_NOPTS_VALUE) {
last_pts = pts;
}
}
#endif
/**
** Decode a video packet.
**
** @param decoder video decoder data
** @param avpkt video packet
*/
int CodecVideoDecode(VideoDecoder * decoder, const AVPacket * avpkt)
{
AVCodecContext *video_ctx;
AVFrame *frame;
int used = 0;
int got_frame = 0;
int interlaced = 0;
AVPacket pkt[1];
#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(58,10,100)
int parser_ret;
uint8_t *data;
size_t data_size;
data = avpkt->data;
data_size = avpkt->size;
#endif
video_ctx = decoder->VideoCtx;
if (video_ctx && video_ctx->codec_type == AVMEDIA_TYPE_VIDEO) {
frame = decoder->Frame;
*pkt = *avpkt; // use copy
#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(58,10,100)
while (data_size > 0) {
if (decoder->parser) {
parser_ret = av_parser_parse2(decoder->parser, video_ctx, &pkt->data, &pkt->size,
data, data_size, AV_NOPTS_VALUE, AV_NOPTS_VALUE, 0);
if (parser_ret < 0) {
Debug(3,"parser err %d\n",parser_ret);
break;
}
data += parser_ret;
data_size -= parser_ret;
} else {
data_size = 0;
}
#endif
if (pkt->size) {
#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(57,37,100)
used = avcodec_send_packet(video_ctx, pkt);
if (used < 0 && used != AVERROR(EAGAIN)&& used != AVERROR_EOF)
return -1;
while(!used) { //multiple frames
used = avcodec_receive_frame(video_ctx, frame);
if (used < 0 && used != AVERROR(EAGAIN) && used != AVERROR_EOF)
return -1;
if (used>=0)
got_frame = 1;
else got_frame = 0;
if (VideoIsDriverVdpau() && decoder->VideoCtx->hw_frames_ctx) {
#ifdef FFMPEG_4_WORKAROUND_ARTIFACTS
//VDPAU interlaced frames not clean after the codec flush, drop it before 2 key frames
#if LIBAVUTIL_VERSION_INT < AV_VERSION_INT(58,7,100)
interlaced = video_ctx->framerate.num > 0 ? (video_ctx->framerate.num / video_ctx->framerate.den <= 30) : frame->interlaced_frame;
if (got_frame && frame->pict_type == 1 && interlaced) decoder->FirstKeyFrame++;
if (got_frame && interlaced && decoder->FirstKeyFrame < 3) got_frame = 0;
#else
interlaced = video_ctx->framerate.num > 0 ? (video_ctx->framerate.num / video_ctx->framerate.den <= 30) : frame->flags & AV_FRAME_FLAG_INTERLACED;
if (got_frame && frame->pict_type == 1 && interlaced) decoder->FirstKeyFrame++;
if (got_frame && interlaced && decoder->FirstKeyFrame < 3) got_frame = 0;
#endif
#endif
}
#else
next_part:
used = avcodec_decode_video2(video_ctx, frame, &got_frame, pkt);
#endif
Debug(4, "%s: %p %d -> %d %d\n", __FUNCTION__, pkt->data, pkt->size, used, got_frame);
if (got_frame) { // frame completed
#ifdef FFMPEG_WORKAROUND_ARTIFACTS
if (!CodecUsePossibleDefectFrames && decoder->FirstKeyFrame) {
decoder->FirstKeyFrame++;
if (frame->key_frame) {
Debug(3, "codec: key frame after %d frames\n",
decoder->FirstKeyFrame);
decoder->FirstKeyFrame = 0;
}
} else {
#endif
#ifdef USE_AVFILTER
//avfilter used for Cuvid(software), NVdec and CPU video modules
if (decoder->filter_graph) {
int ret;
if (av_buffersrc_add_frame_flags(decoder->buffersrc_ctx, frame, AV_BUFFERSRC_FLAG_KEEP_REF) < 0) {
Error(_("Error while feeding the filtergraph\n"));
got_frame = 0;
}
while (got_frame) {
ret = av_buffersink_get_frame(decoder->buffersink_ctx, decoder->Filt_Frame);
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
break;
if (ret < 0) {
#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(56,28,1)
av_frame_unref(decoder->Filt_Frame);
#endif
return -1;
}
decoder->Filt_Frame->pts /=2;
#if LIBAVUTIL_VERSION_INT < AV_VERSION_INT(58,7,100)
interlaced = frame->interlaced_frame;
decoder->Filt_Frame->interlaced_frame = 0;
#else
interlaced = frame->flags & AV_FRAME_FLAG_INTERLACED;
decoder->Filt_Frame->flags &= ~AV_FRAME_FLAG_INTERLACED;
#endif
decoder->Filt_Frame->sample_aspect_ratio = frame->sample_aspect_ratio;
// in most cases mpeg2 is interlaced and has flag issues
if (video_ctx->framerate.num > 0 && (video_ctx->framerate.num / video_ctx->framerate.den <= 30)
&& (interlaced || video_ctx->codec_id == AV_CODEC_ID_MPEG2VIDEO))
video_ctx->framerate.num *= 2;
//do not render frames when flush buffers
//avfilter not flushed when called avcodec_flush_buffers()
if(decoder->FirstKeyFrame > 1)
VideoRenderFrame(decoder->HwDecoder, video_ctx, decoder->Filt_Frame);
#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(56,28,1)
av_frame_unref(decoder->Filt_Frame);
#endif
}
} else
#endif
//DisplayPts(video_ctx, frame);
VideoRenderFrame(decoder->HwDecoder, video_ctx, frame);
#ifdef FFMPEG_WORKAROUND_ARTIFACTS
}
#endif
#ifdef USE_AVFILTER
//for drop avfilter output frames when flushed buffers
if (decoder->filter_graph) decoder->FirstKeyFrame++;
#endif
} else {
// some frames are needed for references, interlaced frames ...
// could happen with h264 dvb streams, just drop data.
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(60,2,100)
Debug(4, "codec: %8d incomplete interlaced frame %d bytes used\n",
video_ctx->frame_number, used);
#else
Debug(4, "codec: %8ld incomplete interlaced frame %d bytes used\n",
video_ctx->frame_num, used);
#endif
}
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(57,37,100)
// old code to support truncated or multi frame packets