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ffmpegencode.c
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/*
* avencode.c
* VideoMonkey
*
* Created by Chris Marrin on 11/19/08.
* Copyright 2008 Apple. All rights reserved.
*
*/
#include "ffmpegencode.h"
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <unistd.h>
#include <assert.h>
#include "libavformat/avformat.h"
#include "libavcodec/audioconvert.h"
#include "libavutil/fifo.h"
#include "libswscale/swscale.h"
#include "libavcodec/opt.h"
#include "cmdutils.h"
/* select an input stream for an output stream */
typedef struct AVStreamMap {
int file_index;
int stream_index;
int sync_file_index;
int sync_stream_index;
} AVStreamMap;
typedef struct AVMetaDataMap {
int out_file;
int in_file;
} AVMetaDataMap;
#define MAX_FILES 20
// Context
typedef struct Context {
ffmpeg_Callback myCB;
void* myUserData;
AVInputFormat *file_iformat;
AVOutputFormat *file_oformat;
int frame_width;
int frame_height;
AVRational frame_rate;
float video_qscale;
float frame_aspect_ratio;
enum PixelFormat frame_pix_fmt;
enum SampleFormat audio_sample_fmt;
AVFormatContext* output_files[MAX_FILES];
AVCodec* output_codecs[MAX_FILES*MAX_STREAMS];
int nb_output_files;
int nb_ocodecs;
AVFormatContext *input_files[MAX_FILES];
int64_t input_files_ts_offset[MAX_FILES];
double input_files_ts_scale[MAX_FILES][MAX_STREAMS];
AVCodec *input_codecs[MAX_FILES*MAX_STREAMS];
int nb_input_files;
int nb_icodecs;
AVStreamMap stream_maps[MAX_FILES*MAX_STREAMS];
int nb_stream_maps;
AVMetaDataMap meta_data_maps[MAX_FILES];
int nb_meta_data_maps;
int force_fps;
AVBitStreamFilterContext *video_bitstream_filters;
AVBitStreamFilterContext *audio_bitstream_filters;
AVBitStreamFilterContext *subtitle_bitstream_filters;
AVBitStreamFilterContext *bitstream_filters[MAX_FILES][MAX_STREAMS];
int opt_programid;
int audio_volume;
int audio_sync_method;
int video_sync_method;
int frame_topBand;
int frame_bottomBand;
int frame_leftBand;
int frame_rightBand;
int frame_padtop;
int frame_padbottom;
int frame_padleft;
int frame_padright;
int padcolor[3];
unsigned int sws_flags;
char* pass_logfilename;
int bit_buffer_size;
uint8_t* bit_buffer;
int verbose;
int64_t timer_start;
int input_sync;
int max_frames[4];
int64_t recording_time;
uint64_t limit_filesize;
int opt_shortest;
float dts_delta_threshold;
int copy_ts;
int64_t start_time;
float audio_drift_threshold;
int64_t video_size;
int64_t audio_size;
int64_t extra_size;
int nb_frames_dup;
int nb_frames_drop;
char *vstats_filename;
FILE *vstats_file;
uint16_t *intra_matrix;
uint16_t *inter_matrix;
int audio_stream_copy;
int video_stream_copy;
int subtitle_stream_copy;
char *video_standard;
int video_global_header;
const char *video_rc_override_string;
int video_disable;
int video_discard;
char *video_codec_name;
int video_codec_tag;
int same_quality;
int do_deinterlace;
int top_field_first;
int me_threshold;
int intra_dc_precision;
int loop_input;
int loop_output;
int qp_hist;
int intra_only;
int audio_sample_rate;
#define QSCALE_NONE -99999
float audio_qscale;
int audio_disable;
int audio_channels;
char *audio_codec_name;
int audio_codec_tag;
char *audio_language;
int subtitle_disable;
char *subtitle_codec_name;
char *subtitle_language;
float mux_preload;
float mux_max_delay;
int thread_count;
} Context;
// Forward declarations
static int ffmpeg_encode(Context* ctx);
static void _finish(Context* ctx);
static int opt_output_file(Context* ctx, const char *filename);
// Interface
ffmpeg_Context ffmpeg_createContext(ffmpeg_Callback cb, void* userData)
{
Context* ctx = malloc(sizeof(Context));
memset(ctx, 0, sizeof(Context));
ctx->myCB = cb;
ctx->myUserData = userData;
// ints for ffmpeg vars
ctx->audio_volume = 256;
ctx->sws_flags = SWS_BICUBIC;
ctx->bit_buffer_size = 1024*256;
ctx->max_frames[0] = INT_MAX;
ctx->max_frames[1] = INT_MAX;
ctx->max_frames[2] = INT_MAX;
ctx->max_frames[3] = INT_MAX;
ctx->recording_time = INT64_MAX;
ctx->dts_delta_threshold = 10;
ctx->audio_drift_threshold = 0.1;
ctx->video_sync_method = -1;
ctx->padcolor[0] = 16;
ctx->padcolor[1] = 128;
ctx->padcolor[2] = 128;
ctx->top_field_first = -1;
ctx->intra_dc_precision = 8;
ctx->loop_output = AVFMT_NOOUTPUTLOOP;
ctx->audio_sample_rate = 44100;
ctx->audio_qscale = QSCALE_NONE;
ctx->audio_channels = 1;
ctx->mux_preload = 0.5;
ctx->mux_max_delay = 0.7;
ctx->thread_count = 1;
ctx->frame_pix_fmt = PIX_FMT_NONE;
ctx->audio_sample_fmt = SAMPLE_FMT_NONE;
return ctx;
}
void ffmpeg_destroyContext(ffmpeg_Context _ctx)
{
_finish((Context*) _ctx);
free(_ctx);
}
int ffmpeg_addInputFile(ffmpeg_Context _ctx, const char* filename)
{
return -1;
}
int ffmpeg_addOutputFile(ffmpeg_Context _ctx, const char* filename)
{
return opt_output_file((Context*) _ctx, filename);
}
void ffmpeg_setParam(ffmpeg_Context _ctx, const char* name, const char* value)
{
}
void ffmpeg_startEncode(ffmpeg_Context _ctx)
{
}
void ffmpeg_pauseEncode(ffmpeg_Context _ctx)
{
}
void ffmpeg_cancelEncode(ffmpeg_Context _ctx)
{
}
float ffmpeg_getProgress(ffmpeg_Context _ctx)
{
return -1;
}
float ffmpeg_getFloatParam(ffmpeg_Context _ctx, const char* name)
{
return -1;
}
const char* ffmpeg_getStringParam(ffmpeg_Context _ctx, const char* name)
{
return "";
}
// internal structures
typedef struct AVOutputStream {
int file_index; /* file index */
int index; /* stream index in the output file */
int source_index; /* AVInputStream index */
AVStream *st; /* stream in the output file */
int encoding_needed; /* true if encoding needed for this stream */
int frame_number;
/* input pts and corresponding output pts
for A/V sync */
//double sync_ipts; /* dts from the AVPacket of the demuxer in second units */
struct AVInputStream *sync_ist; /* input stream to sync against */
int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ //FIXME look at frame_number
/* video only */
int video_resample;
AVFrame pict_tmp; /* temporary image for resampling */
struct SwsContext *img_resample_ctx; /* for image resampling */
int resample_height;
int video_crop;
int topBand; /* cropping area sizes */
int leftBand;
int video_pad;
int padtop; /* padding area sizes */
int padbottom;
int padleft;
int padright;
/* audio only */
int audio_resample;
ReSampleContext *resample; /* for audio resampling */
int reformat_pair;
AVAudioConvert *reformat_ctx;
AVFifoBuffer fifo; /* for compression: one audio fifo per codec */
FILE *logfile;
} AVOutputStream;
typedef struct AVInputStream {
int file_index;
int index;
AVStream *st;
int discard; /* true if stream data should be discarded */
int decoding_needed; /* true if the packets must be decoded in 'raw_fifo' */
int64_t sample_index; /* current sample */
int64_t start; /* time when read started */
unsigned long frame; /* current frame */
int64_t next_pts; /* synthetic pts for cases where pkt.pts
is not defined */
int64_t pts; /* current pts */
int is_start; /* is 1 at the start and after a discontinuity */
} AVInputStream;
typedef struct AVInputFile {
int eof_reached; /* true if eof reached */
int ist_index; /* index of first stream in ist_table */
int buffer_size; /* current total buffer size */
int nb_streams; /* nb streams we are aware of */
} AVInputFile;
#define MAKE_SFMT_PAIR(a,b) ((a)+SAMPLE_FMT_NB*(b))
#define DEFAULT_PASS_LOGFILENAME "ffmpeg2pass"
#define MAX_AUDIO_PACKET_SIZE (128 * 1024)
// Implementation
static int stream_index_from_inputs(AVFormatContext **input_files,
int nb_input_files,
AVInputFile *file_table,
AVInputStream **ist_table,
enum CodecType type,
int programid)
{
int p, q, z;
for(z=0; z<nb_input_files; z++) {
AVFormatContext *ic = input_files[z];
for(p=0; p<ic->nb_programs; p++) {
AVProgram *program = ic->programs[p];
if(program->id != programid)
continue;
for(q=0; q<program->nb_stream_indexes; q++) {
int sidx = program->stream_index[q];
int ris = file_table[z].ist_index + sidx;
if(ist_table[ris]->discard && ic->streams[sidx]->codec->codec_type == type)
return ris;
}
}
}
return -1;
}
static int decode_interrupt_cb(void)
{
return 0; //q_pressed || (q_pressed = read_key() == 'q');
}
static void print_sdp(AVFormatContext **avc, int n)
{
char sdp[2048];
avf_sdp_create(avc, n, sdp, sizeof(sdp));
printf("SDP:\n%s\n", sdp);
fflush(stdout);
}
static int read_ffserver_streams(Context* ctx, AVFormatContext *s, const char *filename)
{
int i, err;
AVFormatContext *ic;
int nopts = 0;
err = av_open_input_file(&ic, filename, NULL, FFM_PACKET_SIZE, NULL);
if (err < 0)
return err;
/* copy stream format */
s->nb_streams = ic->nb_streams;
for(i=0;i<ic->nb_streams;i++) {
AVStream *st;
// FIXME: a more elegant solution is needed
st = av_mallocz(sizeof(AVStream));
memcpy(st, ic->streams[i], sizeof(AVStream));
st->codec = avcodec_alloc_context();
memcpy(st->codec, ic->streams[i]->codec, sizeof(AVCodecContext));
s->streams[i] = st;
if (st->codec->codec_type == CODEC_TYPE_AUDIO && ctx->audio_stream_copy)
st->stream_copy = 1;
else if (st->codec->codec_type == CODEC_TYPE_VIDEO && ctx->video_stream_copy)
st->stream_copy = 1;
if(!st->codec->thread_count)
st->codec->thread_count = 1;
if(st->codec->thread_count>1)
avcodec_thread_init(st->codec, st->codec->thread_count);
if(st->codec->flags & CODEC_FLAG_BITEXACT)
nopts = 1;
}
if (!nopts)
s->timestamp = av_gettime();
av_close_input_file(ic);
return 0;
}
static double
get_sync_ipts(const AVOutputStream *ost, int64_t start_time)
{
const AVInputStream *ist = ost->sync_ist;
return (double)(ist->pts - start_time)/AV_TIME_BASE;
}
static void write_frame(AVFormatContext *s, AVPacket *pkt, AVCodecContext *avctx, AVBitStreamFilterContext *bsfc){
int ret;
while(bsfc){
AVPacket new_pkt= *pkt;
int a= av_bitstream_filter_filter(bsfc, avctx, NULL,
&new_pkt.data, &new_pkt.size,
pkt->data, pkt->size,
pkt->flags & PKT_FLAG_KEY);
if(a>0){
av_free_packet(pkt);
new_pkt.destruct= av_destruct_packet;
} else if(a<0){
fprintf(stderr, "%s failed for stream %d, codec %s",
bsfc->filter->name, pkt->stream_index,
avctx->codec ? avctx->codec->name : "copy");
print_error("", a);
}
*pkt= new_pkt;
bsfc= bsfc->next;
}
ret= av_interleaved_write_frame(s, pkt);
if(ret < 0){
print_error("av_interleaved_write_frame()", ret);
//av_exit(1);
}
}
static void check_audio_video_sub_inputs(Context* ctx, int *has_video_ptr, int *has_audio_ptr,
int *has_subtitle_ptr)
{
int has_video, has_audio, has_subtitle, i, j;
AVFormatContext *ic;
has_video = 0;
has_audio = 0;
has_subtitle = 0;
for(j=0;j<ctx->nb_input_files;j++) {
ic = ctx->input_files[j];
for(i=0;i<ic->nb_streams;i++) {
AVCodecContext *enc = ic->streams[i]->codec;
switch(enc->codec_type) {
case CODEC_TYPE_AUDIO:
has_audio = 1;
break;
case CODEC_TYPE_VIDEO:
has_video = 1;
break;
case CODEC_TYPE_SUBTITLE:
has_subtitle = 1;
break;
case CODEC_TYPE_DATA:
case CODEC_TYPE_ATTACHMENT:
case CODEC_TYPE_UNKNOWN:
break;
default:
abort();
}
}
}
*has_video_ptr = has_video;
*has_audio_ptr = has_audio;
*has_subtitle_ptr = has_subtitle;
}
static enum CodecID find_codec_or_die(const char *name, int type, int encoder)
{
const char *codec_string = encoder ? "encoder" : "decoder";
AVCodec *codec;
if(!name)
return CODEC_ID_NONE;
codec = encoder ?
avcodec_find_encoder_by_name(name) :
avcodec_find_decoder_by_name(name);
if(!codec) {
av_log(NULL, AV_LOG_ERROR, "Unknown %s '%s'\n", codec_string, name);
return CODEC_ID_NONE;
}
if(codec->type != type) {
av_log(NULL, AV_LOG_ERROR, "Invalid %s type '%s'\n", codec_string, name);
return CODEC_ID_NONE;
}
return codec->id;
}
static void new_video_stream(Context* ctx, AVFormatContext *oc)
{
AVStream *st;
AVCodecContext *video_enc;
int codec_id;
st = av_new_stream(oc, oc->nb_streams);
if (!st) {
fprintf(stderr, "Could not alloc stream\n");
//av_exit(1);
}
avcodec_get_context_defaults2(st->codec, CODEC_TYPE_VIDEO);
ctx->bitstream_filters[ctx->nb_output_files][oc->nb_streams - 1]= ctx->video_bitstream_filters;
ctx->video_bitstream_filters= NULL;
if(ctx->thread_count>1)
avcodec_thread_init(st->codec, ctx->thread_count);
video_enc = st->codec;
if(ctx->video_codec_tag)
video_enc->codec_tag= ctx->video_codec_tag;
if( (ctx->video_global_header&1)
|| (ctx->video_global_header==0 && (oc->oformat->flags & AVFMT_GLOBALHEADER))){
video_enc->flags |= CODEC_FLAG_GLOBAL_HEADER;
avctx_opts[CODEC_TYPE_VIDEO]->flags|= CODEC_FLAG_GLOBAL_HEADER;
}
if(ctx->video_global_header&2){
video_enc->flags2 |= CODEC_FLAG2_LOCAL_HEADER;
avctx_opts[CODEC_TYPE_VIDEO]->flags2|= CODEC_FLAG2_LOCAL_HEADER;
}
if (ctx->video_stream_copy) {
st->stream_copy = 1;
video_enc->codec_type = CODEC_TYPE_VIDEO;
video_enc->sample_aspect_ratio =
st->sample_aspect_ratio = av_d2q(ctx->frame_aspect_ratio*ctx->frame_height/ctx->frame_width, 255);
} else {
const char *p;
int i;
AVCodec *codec;
AVRational fps= ctx->frame_rate.num ? ctx->frame_rate : (AVRational){25,1};
if (ctx->video_codec_name) {
codec_id = find_codec_or_die(ctx->video_codec_name, CODEC_TYPE_VIDEO, 1);
codec = avcodec_find_encoder_by_name(ctx->video_codec_name);
ctx->output_codecs[ctx->nb_ocodecs] = codec;
} else {
codec_id = av_guess_codec(oc->oformat, NULL, oc->filename, NULL, CODEC_TYPE_VIDEO);
codec = avcodec_find_encoder(codec_id);
}
video_enc->codec_id = codec_id;
set_context_opts(video_enc, avctx_opts[CODEC_TYPE_VIDEO], AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM);
if (codec && codec->supported_framerates && !ctx->force_fps)
fps = codec->supported_framerates[av_find_nearest_q_idx(fps, codec->supported_framerates)];
video_enc->time_base.den = fps.num;
video_enc->time_base.num = fps.den;
video_enc->width = ctx->frame_width + ctx->frame_padright + ctx->frame_padleft;
video_enc->height = ctx->frame_height + ctx->frame_padtop + ctx->frame_padbottom;
video_enc->sample_aspect_ratio = av_d2q(ctx->frame_aspect_ratio*video_enc->height/video_enc->width, 255);
video_enc->pix_fmt = ctx->frame_pix_fmt;
st->sample_aspect_ratio = video_enc->sample_aspect_ratio;
if(codec && codec->pix_fmts){
const enum PixelFormat *p= codec->pix_fmts;
for(; *p!=-1; p++){
if(*p == video_enc->pix_fmt)
break;
}
if(*p == -1)
video_enc->pix_fmt = codec->pix_fmts[0];
}
if (ctx->intra_only)
video_enc->gop_size = 0;
if (ctx->video_qscale || ctx->same_quality) {
video_enc->flags |= CODEC_FLAG_QSCALE;
video_enc->global_quality = st->quality = FF_QP2LAMBDA * ctx->video_qscale;
}
if(ctx->intra_matrix)
video_enc->intra_matrix = ctx->intra_matrix;
if(ctx->inter_matrix)
video_enc->inter_matrix = ctx->inter_matrix;
video_enc->thread_count = ctx->thread_count;
p= ctx->video_rc_override_string;
for(i=0; p; i++){
int start, end, q;
int e=sscanf(p, "%d,%d,%d", &start, &end, &q);
if(e!=3){
fprintf(stderr, "error parsing rc_override\n");
return; //av_exit(1);
}
video_enc->rc_override=
av_realloc(video_enc->rc_override,
sizeof(RcOverride)*(i+1));
video_enc->rc_override[i].start_frame= start;
video_enc->rc_override[i].end_frame = end;
if(q>0){
video_enc->rc_override[i].qscale= q;
video_enc->rc_override[i].quality_factor= 1.0;
}
else{
video_enc->rc_override[i].qscale= 0;
video_enc->rc_override[i].quality_factor= -q/100.0;
}
p= strchr(p, '/');
if(p) p++;
}
video_enc->rc_override_count=i;
if (!video_enc->rc_initial_buffer_occupancy)
video_enc->rc_initial_buffer_occupancy = video_enc->rc_buffer_size*3/4;
video_enc->me_threshold= me_threshold;
video_enc->intra_dc_precision= intra_dc_precision - 8;
if (do_psnr)
video_enc->flags|= CODEC_FLAG_PSNR;
/* two pass mode */
if (do_pass) {
if (do_pass == 1) {
video_enc->flags |= CODEC_FLAG_PASS1;
} else {
video_enc->flags |= CODEC_FLAG_PASS2;
}
}
}
nb_ocodecs++;
/* reset some key parameters */
video_disable = 0;
av_freep(&video_codec_name);
video_stream_copy = 0;
}
static void new_audio_stream(Context* ctx, AVFormatContext *oc)
{
AVStream *st;
AVCodecContext *audio_enc;
int codec_id;
st = av_new_stream(oc, oc->nb_streams);
if (!st) {
fprintf(stderr, "Could not alloc stream\n");
av_exit(1);
}
avcodec_get_context_defaults2(st->codec, CODEC_TYPE_AUDIO);
bitstream_filters[nb_output_files][oc->nb_streams - 1]= audio_bitstream_filters;
audio_bitstream_filters= NULL;
if(thread_count>1)
avcodec_thread_init(st->codec, thread_count);
audio_enc = st->codec;
audio_enc->codec_type = CODEC_TYPE_AUDIO;
if(audio_codec_tag)
audio_enc->codec_tag= audio_codec_tag;
if (oc->oformat->flags & AVFMT_GLOBALHEADER) {
audio_enc->flags |= CODEC_FLAG_GLOBAL_HEADER;
avctx_opts[CODEC_TYPE_AUDIO]->flags|= CODEC_FLAG_GLOBAL_HEADER;
}
if (audio_stream_copy) {
st->stream_copy = 1;
audio_enc->channels = audio_channels;
} else {
AVCodec *codec;
set_context_opts(audio_enc, avctx_opts[CODEC_TYPE_AUDIO], AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM);
if (audio_codec_name) {
codec_id = find_codec_or_die(audio_codec_name, CODEC_TYPE_AUDIO, 1);
codec = avcodec_find_encoder_by_name(audio_codec_name);
output_codecs[nb_ocodecs] = codec;
} else {
codec_id = av_guess_codec(oc->oformat, NULL, oc->filename, NULL, CODEC_TYPE_AUDIO);
codec = avcodec_find_encoder(codec_id);
}
audio_enc->codec_id = codec_id;
if (audio_qscale > QSCALE_NONE) {
audio_enc->flags |= CODEC_FLAG_QSCALE;
audio_enc->global_quality = st->quality = FF_QP2LAMBDA * audio_qscale;
}
audio_enc->thread_count = thread_count;
audio_enc->channels = audio_channels;
audio_enc->sample_fmt = audio_sample_fmt;
if(codec && codec->sample_fmts){
const enum SampleFormat *p= codec->sample_fmts;
for(; *p!=-1; p++){
if(*p == audio_enc->sample_fmt)
break;
}
if(*p == -1)
audio_enc->sample_fmt = codec->sample_fmts[0];
}
}
nb_ocodecs++;
audio_enc->sample_rate = audio_sample_rate;
audio_enc->time_base= (AVRational){1, audio_sample_rate};
if (audio_language) {
av_strlcpy(st->language, audio_language, sizeof(st->language));
av_free(audio_language);
audio_language = NULL;
}
/* reset some key parameters */
audio_disable = 0;
av_freep(&audio_codec_name);
audio_stream_copy = 0;
}
static void new_subtitle_stream(Context* ctx, AVFormatContext *oc)
{
AVStream *st;
AVCodecContext *subtitle_enc;
st = av_new_stream(oc, oc->nb_streams);
if (!st) {
fprintf(stderr, "Could not alloc stream\n");
av_exit(1);
}
avcodec_get_context_defaults2(st->codec, CODEC_TYPE_SUBTITLE);
bitstream_filters[nb_output_files][oc->nb_streams - 1]= subtitle_bitstream_filters;
subtitle_bitstream_filters= NULL;
subtitle_enc = st->codec;
subtitle_enc->codec_type = CODEC_TYPE_SUBTITLE;
if (subtitle_stream_copy) {
st->stream_copy = 1;
} else {
set_context_opts(avctx_opts[CODEC_TYPE_SUBTITLE], subtitle_enc, AV_OPT_FLAG_SUBTITLE_PARAM | AV_OPT_FLAG_ENCODING_PARAM);
subtitle_enc->codec_id = find_codec_or_die(subtitle_codec_name, CODEC_TYPE_SUBTITLE, 1);
output_codecs[nb_ocodecs] = avcodec_find_encoder_by_name(subtitle_codec_name);
}
nb_ocodecs++;
if (subtitle_language) {
av_strlcpy(st->language, subtitle_language, sizeof(st->language));
av_free(subtitle_language);
subtitle_language = NULL;
}
subtitle_disable = 0;
av_freep(&subtitle_codec_name);
subtitle_stream_copy = 0;
}
static int do_audio_out(Context* ctx, AVFormatContext *s,
AVOutputStream *ost,
AVInputStream *ist,
unsigned char *buf, int size)
{
uint8_t *buftmp;
static uint8_t *audio_buf = NULL;
static uint8_t *audio_out = NULL;
static uint8_t *audio_out2 = NULL;
const int audio_out_size= 4*MAX_AUDIO_PACKET_SIZE;
int size_out, frame_bytes, ret;
AVCodecContext *enc= ost->st->codec;
AVCodecContext *dec= ist->st->codec;
int osize= av_get_bits_per_sample_format(enc->sample_fmt)/8;
int isize= av_get_bits_per_sample_format(dec->sample_fmt)/8;
/* SC: dynamic allocation of buffers */
if (!audio_buf)
audio_buf = av_malloc(2*MAX_AUDIO_PACKET_SIZE);
if (!audio_out)
audio_out = av_malloc(audio_out_size);
if (!audio_buf || !audio_out)
return 1; /* Should signal an error ! */
if (enc->channels != dec->channels)
ost->audio_resample = 1;
if (ost->audio_resample && !ost->resample) {
if (dec->sample_fmt != SAMPLE_FMT_S16) {
fprintf(stderr, "Audio resampler only works with 16 bits per sample, patch welcome.\n");
return -1;
}
ost->resample = audio_resample_init(enc->channels, dec->channels,
enc->sample_rate, dec->sample_rate);
if (!ost->resample) {
fprintf(stderr, "Can not resample %d channels @ %d Hz to %d channels @ %d Hz\n",
dec->channels, dec->sample_rate,
enc->channels, enc->sample_rate);
return -1;
}
}
#define MAKE_SFMT_PAIR(a,b) ((a)+SAMPLE_FMT_NB*(b))
if (dec->sample_fmt!=enc->sample_fmt &&
MAKE_SFMT_PAIR(enc->sample_fmt,dec->sample_fmt)!=ost->reformat_pair) {
if (!audio_out2)
audio_out2 = av_malloc(audio_out_size);
if (!audio_out2)
return -1;
if (ost->reformat_ctx)
av_audio_convert_free(ost->reformat_ctx);
ost->reformat_ctx = av_audio_convert_alloc(enc->sample_fmt, 1,
dec->sample_fmt, 1, NULL, 0);
if (!ost->reformat_ctx) {
fprintf(stderr, "Cannot convert %s sample format to %s sample format\n",
avcodec_get_sample_fmt_name(dec->sample_fmt),
avcodec_get_sample_fmt_name(enc->sample_fmt));
return -1;
}
ost->reformat_pair=MAKE_SFMT_PAIR(enc->sample_fmt,dec->sample_fmt);
}
if(ctx->audio_sync_method){
double delta = get_sync_ipts(ost, ctx->start_time) * enc->sample_rate - ost->sync_opts
- av_fifo_size(&ost->fifo)/(ost->st->codec->channels * 2);
double idelta= delta*ist->st->codec->sample_rate / enc->sample_rate;
int byte_delta= ((int)idelta)*2*ist->st->codec->channels;
//FIXME resample delay
if(fabs(delta) > 50){
if(ist->is_start || fabs(delta) > ctx->audio_drift_threshold*enc->sample_rate){
if(byte_delta < 0){
byte_delta= FFMAX(byte_delta, -size);
size += byte_delta;
buf -= byte_delta;
if(!size)
return 1;
ist->is_start=0;
}else{
static uint8_t *input_tmp= NULL;
input_tmp= av_realloc(input_tmp, byte_delta + size);
if(byte_delta + size <= MAX_AUDIO_PACKET_SIZE)
ist->is_start=0;
else
byte_delta= MAX_AUDIO_PACKET_SIZE - size;
memset(input_tmp, 0, byte_delta);
memcpy(input_tmp + byte_delta, buf, size);
buf= input_tmp;
size += byte_delta;
}
} else if(ctx->audio_sync_method>1){
int comp= av_clip(delta, -ctx->audio_sync_method, ctx->audio_sync_method);
assert(ost->audio_resample);
av_resample_compensate(*(struct AVResampleContext**)ost->resample, comp, enc->sample_rate);
}
}
}else
ost->sync_opts= lrintf(get_sync_ipts(ost, ctx->start_time) * enc->sample_rate)
- av_fifo_size(&ost->fifo)/(ost->st->codec->channels * 2); //FIXME wrong
if (ost->audio_resample) {
buftmp = audio_buf;
size_out = audio_resample(ost->resample,
(short *)buftmp, (short *)buf,
size / (ist->st->codec->channels * isize));
size_out = size_out * enc->channels * osize;
} else {
buftmp = buf;
size_out = size;
}
if (dec->sample_fmt!=enc->sample_fmt) {
const void *ibuf[6]= {buftmp};
void *obuf[6]= {audio_out2};
int istride[6]= {isize};
int ostride[6]= {osize};
int len= size_out/istride[0];
if (av_audio_convert(ost->reformat_ctx, obuf, ostride, ibuf, istride, len)<0) {
printf("av_audio_convert() failed\n");
return 1;
}
buftmp = audio_out2;
size_out = len*osize;
}
/* now encode as many frames as possible */
if (enc->frame_size > 1) {
/* output resampled raw samples */
if (av_fifo_realloc2(&ost->fifo, av_fifo_size(&ost->fifo) + size_out) < 0) {
fprintf(stderr, "av_fifo_realloc2() failed\n");
return -1;
}
av_fifo_generic_write(&ost->fifo, buftmp, size_out, NULL);
frame_bytes = enc->frame_size * osize * enc->channels;
while (av_fifo_size(&ost->fifo) >= frame_bytes) {
AVPacket pkt;
av_init_packet(&pkt);
av_fifo_read(&ost->fifo, audio_buf, frame_bytes);
//FIXME pass ost->sync_opts as AVFrame.pts in avcodec_encode_audio()
ret = avcodec_encode_audio(enc, audio_out, audio_out_size,
(short *)audio_buf);
ctx->audio_size += ret;
pkt.stream_index= ost->index;
pkt.data= audio_out;
pkt.size= ret;
if(enc->coded_frame && enc->coded_frame->pts != AV_NOPTS_VALUE)
pkt.pts= av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);
pkt.flags |= PKT_FLAG_KEY;
write_frame(s, &pkt, ost->st->codec, ctx->bitstream_filters[ost->file_index][pkt.stream_index]);
ost->sync_opts += enc->frame_size;
}
} else {
AVPacket pkt;
int coded_bps = av_get_bits_per_sample(enc->codec->id)/8;
av_init_packet(&pkt);
ost->sync_opts += size_out / (osize * enc->channels);
/* output a pcm frame */
/* determine the size of the coded buffer */
size_out /= osize;
if (coded_bps)
size_out *= coded_bps;
//FIXME pass ost->sync_opts as AVFrame.pts in avcodec_encode_audio()
ret = avcodec_encode_audio(enc, audio_out, size_out,
(short *)buftmp);
ctx->audio_size += ret;
pkt.stream_index= ost->index;
pkt.data= audio_out;
pkt.size= ret;
if(enc->coded_frame && enc->coded_frame->pts != AV_NOPTS_VALUE)
pkt.pts= av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);
pkt.flags |= PKT_FLAG_KEY;
write_frame(s, &pkt, ost->st->codec, ctx->bitstream_filters[ost->file_index][pkt.stream_index]);
}
return 1;
}
static void pre_process_video_frame(Context* ctx, AVInputStream *ist, AVPicture *picture, void **bufp)
{
AVCodecContext *dec;
AVPicture *picture2;
AVPicture picture_tmp;
uint8_t *buf = 0;
dec = ist->st->codec;
/* deinterlace : must be done before any resize */
if (ctx->do_deinterlace) {
int size;
/* create temporary picture */
size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
buf = av_malloc(size);
if (!buf)
return;
picture2 = &picture_tmp;
avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
if (ctx->do_deinterlace){
if(avpicture_deinterlace(picture2, picture,
dec->pix_fmt, dec->width, dec->height) < 0) {
/* if error, do not deinterlace */
fprintf(stderr, "Deinterlacing failed\n");
av_free(buf);
buf = NULL;
picture2 = picture;
}
} else {
av_picture_copy(picture2, picture, dec->pix_fmt, dec->width, dec->height);
}
} else {
picture2 = picture;
}
if (picture != picture2)
*picture = *picture2;
*bufp = buf;
}
static void do_video_out(Context* ctx, AVFormatContext *s,
AVOutputStream *ost,
AVInputStream *ist,
AVFrame *in_picture,
int *frame_size)
{
int nb_frames, i, ret;
AVFrame *final_picture, *formatted_picture, *resampling_dst, *padding_src;
AVFrame picture_crop_temp, picture_pad_temp;
AVCodecContext *enc, *dec;
avcodec_get_frame_defaults(&picture_crop_temp);
avcodec_get_frame_defaults(&picture_pad_temp);
enc = ost->st->codec;
dec = ist->st->codec;
/* by default, we output a single frame */
nb_frames = 1;
*frame_size = 0;
if(ctx->video_sync_method>0 || (ctx->video_sync_method && av_q2d(enc->time_base) > 0.001)){
double vdelta;