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ffmpeg.c
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/*
* ffmpeg main
* Copyright (c) 2000-2003 Fabrice Bellard
*
* 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 "config.h"
#include <ctype.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#include <errno.h>
#include <signal.h>
#include <limits.h>
#include <unistd.h>
#include "libavformat/avformat.h"
#include "libavdevice/avdevice.h"
#include "libswscale/swscale.h"
#include "libavutil/opt.h"
#include "libavcodec/audioconvert.h"
#include "libavutil/audioconvert.h"
#include "libavutil/parseutils.h"
#include "libavutil/samplefmt.h"
#include "libavutil/colorspace.h"
#include "libavutil/fifo.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/dict.h"
#include "libavutil/mathematics.h"
#include "libavutil/pixdesc.h"
#include "libavutil/avstring.h"
#include "libavutil/libm.h"
#include "libavformat/os_support.h"
#include "libswresample/swresample.h"
#include "libavformat/ffm.h" // not public API
#if CONFIG_AVFILTER
# include "libavfilter/avcodec.h"
# include "libavfilter/avfilter.h"
# include "libavfilter/avfiltergraph.h"
# include "libavfilter/buffersink.h"
# include "libavfilter/vsrc_buffer.h"
#endif
#if HAVE_SYS_RESOURCE_H
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#elif HAVE_GETPROCESSTIMES
#include <windows.h>
#endif
#if HAVE_GETPROCESSMEMORYINFO
#include <windows.h>
#include <psapi.h>
#endif
#if HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#if HAVE_TERMIOS_H
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <termios.h>
#elif HAVE_KBHIT
#include <conio.h>
#endif
#include <time.h>
#include "cmdutils.h"
#include "libavutil/avassert.h"
const char program_name[] = "ffmpeg";
const int program_birth_year = 2000;
/* select an input stream for an output stream */
typedef struct StreamMap {
int disabled; /** 1 is this mapping is disabled by a negative map */
int file_index;
int stream_index;
int sync_file_index;
int sync_stream_index;
} StreamMap;
typedef struct {
int file_idx, stream_idx, channel_idx; // input
int ofile_idx, ostream_idx; // output
} AudioChannelMap;
/**
* select an input file for an output file
*/
typedef struct MetadataMap {
int file; ///< file index
char type; ///< type of metadata to copy -- (g)lobal, (s)tream, (c)hapter or (p)rogram
int index; ///< stream/chapter/program number
} MetadataMap;
static const OptionDef options[];
#define MAX_STREAMS 1024 /* arbitrary sanity check value */
static int frame_bits_per_raw_sample = 0;
static int video_discard = 0;
static int same_quant = 0;
static int do_deinterlace = 0;
static int intra_dc_precision = 8;
static int loop_input = 0;
static int loop_output = AVFMT_NOOUTPUTLOOP;
static int qp_hist = 0;
static int intra_only = 0;
static const char *video_codec_name = NULL;
static const char *audio_codec_name = NULL;
static const char *subtitle_codec_name = NULL;
static int file_overwrite = 0;
static int do_benchmark = 0;
static int do_hex_dump = 0;
static int do_pkt_dump = 0;
static int do_psnr = 0;
static int do_pass = 0;
static const char *pass_logfilename_prefix;
static int video_sync_method= -1;
static int audio_sync_method= 0;
static float audio_drift_threshold= 0.1;
static int copy_ts= 0;
static int copy_tb= 0;
static int opt_shortest = 0;
static char *vstats_filename;
static FILE *vstats_file;
static int audio_volume = 256;
static int exit_on_error = 0;
static int using_stdin = 0;
static int run_as_daemon = 0;
static volatile int received_nb_signals = 0;
static int64_t video_size = 0;
static int64_t audio_size = 0;
static int64_t extra_size = 0;
static int nb_frames_dup = 0;
static int nb_frames_drop = 0;
static int input_sync;
static float dts_delta_threshold = 10;
static int print_stats = 1;
static uint8_t *audio_buf;
static uint8_t *audio_out;
static unsigned int allocated_audio_out_size, allocated_audio_buf_size;
static void *samples;
static uint8_t *input_tmp= NULL;
#define DEFAULT_PASS_LOGFILENAME_PREFIX "ffmpeg2pass"
typedef struct InputStream {
int file_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' */
AVCodec *dec;
int64_t start; /* time when read started */
int64_t next_pts; /* synthetic pts for cases where pkt.pts
is not defined */
int64_t pts; /* current pts */
double ts_scale;
int is_start; /* is 1 at the start and after a discontinuity */
int showed_multi_packet_warning;
AVDictionary *opts;
} InputStream;
typedef struct InputFile {
AVFormatContext *ctx;
int eof_reached; /* true if eof reached */
int ist_index; /* index of first stream in input_streams */
int buffer_size; /* current total buffer size */
int64_t ts_offset;
int nb_streams; /* number of stream that ffmpeg is aware of; may be different
from ctx.nb_streams if new streams appear during av_read_frame() */
int rate_emu;
} InputFile;
typedef struct OutputStream {
int file_index; /* file index */
int index; /* stream index in the output file */
int source_index; /* InputStream 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 InputStream *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
AVBitStreamFilterContext *bitstream_filters;
AVCodec *enc;
int64_t max_frames;
/* video only */
int video_resample;
AVFrame resample_frame; /* temporary frame for image resampling */
struct SwsContext *img_resample_ctx; /* for image resampling */
int resample_height;
int resample_width;
int resample_pix_fmt;
AVRational frame_rate;
int force_fps;
int top_field_first;
float frame_aspect_ratio;
/* forced key frames */
int64_t *forced_kf_pts;
int forced_kf_count;
int forced_kf_index;
/* audio only */
int audio_resample;
int audio_channels_map[SWR_CH_MAX]; ///< list of the channels id to pick from the source stream
int audio_channels_mapped; ///< number of channels in audio_channels_map
int resample_sample_fmt;
int resample_channels;
int resample_sample_rate;
float rematrix_volume;
AVFifoBuffer *fifo; /* for compression: one audio fifo per codec */
FILE *logfile;
struct SwrContext *swr;
#if CONFIG_AVFILTER
AVFilterContext *output_video_filter;
AVFilterContext *input_video_filter;
AVFilterBufferRef *picref;
char *avfilter;
AVFilterGraph *graph;
#endif
int64_t sws_flags;
AVDictionary *opts;
int is_past_recording_time;
int stream_copy;
const char *attachment_filename;
int copy_initial_nonkeyframes;
} OutputStream;
#if HAVE_TERMIOS_H
/* init terminal so that we can grab keys */
static struct termios oldtty;
#endif
typedef struct OutputFile {
AVFormatContext *ctx;
AVDictionary *opts;
int ost_index; /* index of the first stream in output_streams */
int64_t recording_time; /* desired length of the resulting file in microseconds */
int64_t start_time; /* start time in microseconds */
uint64_t limit_filesize;
} OutputFile;
static InputStream *input_streams = NULL;
static int nb_input_streams = 0;
static InputFile *input_files = NULL;
static int nb_input_files = 0;
static OutputStream *output_streams = NULL;
static int nb_output_streams = 0;
static OutputFile *output_files = NULL;
static int nb_output_files = 0;
typedef struct OptionsContext {
/* input/output options */
int64_t start_time;
const char *format;
SpecifierOpt *codec_names;
int nb_codec_names;
SpecifierOpt *audio_channels;
int nb_audio_channels;
SpecifierOpt *audio_sample_rate;
int nb_audio_sample_rate;
SpecifierOpt *rematrix_volume;
int nb_rematrix_volume;
SpecifierOpt *frame_rates;
int nb_frame_rates;
SpecifierOpt *frame_sizes;
int nb_frame_sizes;
SpecifierOpt *frame_pix_fmts;
int nb_frame_pix_fmts;
/* input options */
int64_t input_ts_offset;
int rate_emu;
SpecifierOpt *ts_scale;
int nb_ts_scale;
SpecifierOpt *dump_attachment;
int nb_dump_attachment;
/* output options */
StreamMap *stream_maps;
int nb_stream_maps;
AudioChannelMap *audio_channel_maps; ///< one info entry per -map_channel
int nb_audio_channel_maps; ///< number of (valid) -map_channel settings
/* first item specifies output metadata, second is input */
MetadataMap (*meta_data_maps)[2];
int nb_meta_data_maps;
int metadata_global_manual;
int metadata_streams_manual;
int metadata_chapters_manual;
const char **attachments;
int nb_attachments;
int chapters_input_file;
int64_t recording_time;
uint64_t limit_filesize;
float mux_preload;
float mux_max_delay;
int video_disable;
int audio_disable;
int subtitle_disable;
int data_disable;
/* indexed by output file stream index */
int *streamid_map;
int nb_streamid_map;
SpecifierOpt *metadata;
int nb_metadata;
SpecifierOpt *max_frames;
int nb_max_frames;
SpecifierOpt *bitstream_filters;
int nb_bitstream_filters;
SpecifierOpt *codec_tags;
int nb_codec_tags;
SpecifierOpt *sample_fmts;
int nb_sample_fmts;
SpecifierOpt *qscale;
int nb_qscale;
SpecifierOpt *forced_key_frames;
int nb_forced_key_frames;
SpecifierOpt *force_fps;
int nb_force_fps;
SpecifierOpt *frame_aspect_ratios;
int nb_frame_aspect_ratios;
SpecifierOpt *rc_overrides;
int nb_rc_overrides;
SpecifierOpt *intra_matrices;
int nb_intra_matrices;
SpecifierOpt *inter_matrices;
int nb_inter_matrices;
SpecifierOpt *top_field_first;
int nb_top_field_first;
SpecifierOpt *presets;
int nb_presets;
SpecifierOpt *copy_initial_nonkeyframes;
int nb_copy_initial_nonkeyframes;
#if CONFIG_AVFILTER
SpecifierOpt *filters;
int nb_filters;
#endif
} OptionsContext;
#define MATCH_PER_STREAM_OPT(name, type, outvar, fmtctx, st)\
{\
int i, ret;\
for (i = 0; i < o->nb_ ## name; i++) {\
char *spec = o->name[i].specifier;\
if ((ret = check_stream_specifier(fmtctx, st, spec)) > 0)\
outvar = o->name[i].u.type;\
else if (ret < 0)\
exit_program(1);\
}\
}
static void reset_options(OptionsContext *o, int is_input)
{
const OptionDef *po = options;
OptionsContext bak= *o;
/* all OPT_SPEC and OPT_STRING can be freed in generic way */
while (po->name) {
void *dst = (uint8_t*)o + po->u.off;
if (po->flags & OPT_SPEC) {
SpecifierOpt **so = dst;
int i, *count = (int*)(so + 1);
for (i = 0; i < *count; i++) {
av_freep(&(*so)[i].specifier);
if (po->flags & OPT_STRING)
av_freep(&(*so)[i].u.str);
}
av_freep(so);
*count = 0;
} else if (po->flags & OPT_OFFSET && po->flags & OPT_STRING)
av_freep(dst);
po++;
}
av_freep(&o->stream_maps);
av_freep(&o->audio_channel_maps);
av_freep(&o->meta_data_maps);
av_freep(&o->streamid_map);
memset(o, 0, sizeof(*o));
if(is_input) o->recording_time = bak.recording_time;
else o->recording_time = INT64_MAX;
o->mux_max_delay = 0.7;
o->limit_filesize = UINT64_MAX;
o->chapters_input_file = INT_MAX;
uninit_opts();
init_opts();
}
#if CONFIG_AVFILTER
static int configure_video_filters(InputStream *ist, OutputStream *ost)
{
AVFilterContext *last_filter, *filter;
/** filter graph containing all filters including input & output */
AVCodecContext *codec = ost->st->codec;
AVCodecContext *icodec = ist->st->codec;
enum PixelFormat pix_fmts[] = { codec->pix_fmt, PIX_FMT_NONE };
AVBufferSinkParams *buffersink_params = av_buffersink_params_alloc();
AVRational sample_aspect_ratio;
char args[255];
int ret;
ost->graph = avfilter_graph_alloc();
if (ist->st->sample_aspect_ratio.num){
sample_aspect_ratio = ist->st->sample_aspect_ratio;
}else
sample_aspect_ratio = ist->st->codec->sample_aspect_ratio;
snprintf(args, 255, "%d:%d:%d:%d:%d:%d:%d", ist->st->codec->width,
ist->st->codec->height, ist->st->codec->pix_fmt, 1, AV_TIME_BASE,
sample_aspect_ratio.num, sample_aspect_ratio.den);
ret = avfilter_graph_create_filter(&ost->input_video_filter, avfilter_get_by_name("buffer"),
"src", args, NULL, ost->graph);
if (ret < 0)
return ret;
#if FF_API_OLD_VSINK_API
ret = avfilter_graph_create_filter(&ost->output_video_filter, avfilter_get_by_name("buffersink"),
"out", NULL, pix_fmts, ost->graph);
#else
buffersink_params->pixel_fmts = pix_fmts;
ret = avfilter_graph_create_filter(&ost->output_video_filter, avfilter_get_by_name("buffersink"),
"out", NULL, buffersink_params, ost->graph);
#endif
av_freep(&buffersink_params);
if (ret < 0)
return ret;
last_filter = ost->input_video_filter;
if (codec->width != icodec->width || codec->height != icodec->height) {
snprintf(args, 255, "%d:%d:flags=0x%X",
codec->width,
codec->height,
(unsigned)ost->sws_flags);
if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
NULL, args, NULL, ost->graph)) < 0)
return ret;
if ((ret = avfilter_link(last_filter, 0, filter, 0)) < 0)
return ret;
last_filter = filter;
}
snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
ost->graph->scale_sws_opts = av_strdup(args);
if (ost->avfilter) {
AVFilterInOut *outputs = avfilter_inout_alloc();
AVFilterInOut *inputs = avfilter_inout_alloc();
outputs->name = av_strdup("in");
outputs->filter_ctx = last_filter;
outputs->pad_idx = 0;
outputs->next = NULL;
inputs->name = av_strdup("out");
inputs->filter_ctx = ost->output_video_filter;
inputs->pad_idx = 0;
inputs->next = NULL;
if ((ret = avfilter_graph_parse(ost->graph, ost->avfilter, &inputs, &outputs, NULL)) < 0)
return ret;
av_freep(&ost->avfilter);
} else {
if ((ret = avfilter_link(last_filter, 0, ost->output_video_filter, 0)) < 0)
return ret;
}
if ((ret = avfilter_graph_config(ost->graph, NULL)) < 0)
return ret;
codec->width = ost->output_video_filter->inputs[0]->w;
codec->height = ost->output_video_filter->inputs[0]->h;
codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
ost->frame_aspect_ratio ? // overridden by the -aspect cli option
av_d2q(ost->frame_aspect_ratio*codec->height/codec->width, 255) :
ost->output_video_filter->inputs[0]->sample_aspect_ratio;
return 0;
}
#endif /* CONFIG_AVFILTER */
static void term_exit(void)
{
av_log(NULL, AV_LOG_QUIET, "%s", "");
#if HAVE_TERMIOS_H
if(!run_as_daemon)
tcsetattr (0, TCSANOW, &oldtty);
#endif
}
static volatile int received_sigterm = 0;
static void sigterm_handler(int sig)
{
received_sigterm = sig;
received_nb_signals++;
term_exit();
}
static void term_init(void)
{
#if HAVE_TERMIOS_H
if(!run_as_daemon){
struct termios tty;
tcgetattr (0, &tty);
oldtty = tty;
atexit(term_exit);
tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
|INLCR|IGNCR|ICRNL|IXON);
tty.c_oflag |= OPOST;
tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
tty.c_cflag &= ~(CSIZE|PARENB);
tty.c_cflag |= CS8;
tty.c_cc[VMIN] = 1;
tty.c_cc[VTIME] = 0;
tcsetattr (0, TCSANOW, &tty);
signal(SIGQUIT, sigterm_handler); /* Quit (POSIX). */
}
#endif
avformat_network_deinit();
signal(SIGINT , sigterm_handler); /* Interrupt (ANSI). */
signal(SIGTERM, sigterm_handler); /* Termination (ANSI). */
#ifdef SIGXCPU
signal(SIGXCPU, sigterm_handler);
#endif
}
/* read a key without blocking */
static int read_key(void)
{
unsigned char ch;
#if HAVE_TERMIOS_H
int n = 1;
struct timeval tv;
fd_set rfds;
FD_ZERO(&rfds);
FD_SET(0, &rfds);
tv.tv_sec = 0;
tv.tv_usec = 0;
n = select(1, &rfds, NULL, NULL, &tv);
if (n > 0) {
n = read(0, &ch, 1);
if (n == 1)
return ch;
return n;
}
#elif HAVE_KBHIT
# if HAVE_PEEKNAMEDPIPE
static int is_pipe;
static HANDLE input_handle;
DWORD dw, nchars;
if(!input_handle){
input_handle = GetStdHandle(STD_INPUT_HANDLE);
is_pipe = !GetConsoleMode(input_handle, &dw);
}
if (stdin->_cnt > 0) {
read(0, &ch, 1);
return ch;
}
if (is_pipe) {
/* When running under a GUI, you will end here. */
if (!PeekNamedPipe(input_handle, NULL, 0, NULL, &nchars, NULL))
return -1;
//Read it
if(nchars != 0) {
read(0, &ch, 1);
return ch;
}else{
return -1;
}
}
# endif
if(kbhit())
return(getch());
#endif
return -1;
}
static int decode_interrupt_cb(void)
{
return received_nb_signals > 1;
}
void av_noreturn exit_program(int ret)
{
int i;
/* close files */
for(i=0;i<nb_output_files;i++) {
AVFormatContext *s = output_files[i].ctx;
if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
avio_close(s->pb);
avformat_free_context(s);
av_dict_free(&output_files[i].opts);
}
for(i=0;i<nb_input_files;i++) {
av_close_input_file(input_files[i].ctx);
}
for (i = 0; i < nb_input_streams; i++)
av_dict_free(&input_streams[i].opts);
if (vstats_file)
fclose(vstats_file);
av_free(vstats_filename);
av_freep(&input_streams);
av_freep(&input_files);
av_freep(&output_streams);
av_freep(&output_files);
uninit_opts();
av_free(audio_buf);
av_free(audio_out);
allocated_audio_buf_size= allocated_audio_out_size= 0;
av_free(samples);
#if CONFIG_AVFILTER
avfilter_uninit();
#endif
avformat_network_deinit();
av_freep(&input_tmp);
if (received_sigterm) {
av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
(int) received_sigterm);
exit (255);
}
exit(ret); /* not all OS-es handle main() return value */
}
static void assert_avoptions(AVDictionary *m)
{
AVDictionaryEntry *t;
if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
exit_program(1);
}
}
static void assert_codec_experimental(AVCodecContext *c, int encoder)
{
const char *codec_string = encoder ? "encoder" : "decoder";
AVCodec *codec;
if (c->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
"results.\nAdd '-strict experimental' if you want to use it.\n",
codec_string, c->codec->name);
codec = encoder ? avcodec_find_encoder(c->codec->id) : avcodec_find_decoder(c->codec->id);
if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
codec_string, codec->name);
exit_program(1);
}
}
static void choose_sample_fmt(AVStream *st, AVCodec *codec)
{
if(codec && codec->sample_fmts){
const enum AVSampleFormat *p= codec->sample_fmts;
for(; *p!=-1; p++){
if(*p == st->codec->sample_fmt)
break;
}
if (*p == -1) {
if((codec->capabilities & CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codec->sample_fmt) > av_get_sample_fmt_name(codec->sample_fmts[0]))
av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
if(av_get_sample_fmt_name(st->codec->sample_fmt))
av_log(NULL, AV_LOG_WARNING,
"Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
av_get_sample_fmt_name(st->codec->sample_fmt),
codec->name,
av_get_sample_fmt_name(codec->sample_fmts[0]));
st->codec->sample_fmt = codec->sample_fmts[0];
}
}
}
static void choose_sample_rate(AVStream *st, AVCodec *codec)
{
if(codec && codec->supported_samplerates){
const int *p= codec->supported_samplerates;
int best=0;
int best_dist=INT_MAX;
for(; *p; p++){
int dist= abs(st->codec->sample_rate - *p);
if(dist < best_dist){
best_dist= dist;
best= *p;
}
}
if(best_dist){
av_log(st->codec, AV_LOG_WARNING, "Requested sampling rate unsupported using closest supported (%d)\n", best);
}
st->codec->sample_rate= best;
}
}
static void choose_pixel_fmt(AVStream *st, AVCodec *codec)
{
if(codec && codec->pix_fmts){
const enum PixelFormat *p= codec->pix_fmts;
if(st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL){
if(st->codec->codec_id==CODEC_ID_MJPEG){
p= (const enum PixelFormat[]){PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE};
}else if(st->codec->codec_id==CODEC_ID_LJPEG){
p= (const enum PixelFormat[]){PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ444P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_BGRA, PIX_FMT_NONE};
}
}
for(; *p!=-1; p++){
if(*p == st->codec->pix_fmt)
break;
}
if (*p == -1) {
if(st->codec->pix_fmt != PIX_FMT_NONE)
av_log(NULL, AV_LOG_WARNING,
"Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
av_pix_fmt_descriptors[st->codec->pix_fmt].name,
codec->name,
av_pix_fmt_descriptors[codec->pix_fmts[0]].name);
st->codec->pix_fmt = codec->pix_fmts[0];
}
}
}
static double get_sync_ipts(const OutputStream *ost)
{
const InputStream *ist = ost->sync_ist;
OutputFile *of = &output_files[ost->file_index];
return (double)(ist->pts - of->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 & AV_PKT_FLAG_KEY);
if(a>0){
av_free_packet(pkt);
new_pkt.destruct= av_destruct_packet;
} else if(a<0){
av_log(NULL, AV_LOG_ERROR, "%s failed for stream %d, codec %s",
bsfc->filter->name, pkt->stream_index,
avctx->codec ? avctx->codec->name : "copy");
print_error("", a);
if (exit_on_error)
exit_program(1);
}
*pkt= new_pkt;
bsfc= bsfc->next;
}
ret= av_interleaved_write_frame(s, pkt);
if(ret < 0){
print_error("av_interleaved_write_frame()", ret);
exit_program(1);
}
}
static void do_audio_out(AVFormatContext *s,
OutputStream *ost,
InputStream *ist,
unsigned char *buf, int size)
{
uint8_t *buftmp;
int64_t audio_out_size, audio_buf_size;
int64_t allocated_for_size= size;
int size_out, frame_bytes, ret, resample_changed;
AVCodecContext *enc= ost->st->codec;
AVCodecContext *dec= ist->st->codec;
int osize = av_get_bytes_per_sample(enc->sample_fmt);
int isize = av_get_bytes_per_sample(dec->sample_fmt);
const int coded_bps = av_get_bits_per_sample(enc->codec->id);
need_realloc:
audio_buf_size= (allocated_for_size + isize*dec->channels - 1) / (isize*dec->channels);
audio_buf_size= (audio_buf_size*enc->sample_rate + dec->sample_rate) / dec->sample_rate;
audio_buf_size= audio_buf_size*2 + 10000; //safety factors for the deprecated resampling API
audio_buf_size= FFMAX(audio_buf_size, enc->frame_size);
audio_buf_size*= osize*enc->channels;
audio_out_size= FFMAX(audio_buf_size, enc->frame_size * osize * enc->channels);
if(coded_bps > 8*osize)
audio_out_size= audio_out_size * coded_bps / (8*osize);
audio_out_size += FF_MIN_BUFFER_SIZE;
if(audio_out_size > INT_MAX || audio_buf_size > INT_MAX){
av_log(NULL, AV_LOG_FATAL, "Buffer sizes too large\n");
exit_program(1);
}
av_fast_malloc(&audio_buf, &allocated_audio_buf_size, audio_buf_size);
av_fast_malloc(&audio_out, &allocated_audio_out_size, audio_out_size);
if (!audio_buf || !audio_out){
av_log(NULL, AV_LOG_FATAL, "Out of memory in do_audio_out\n");
exit_program(1);
}
if (enc->channels != dec->channels
|| enc->sample_fmt != dec->sample_fmt)
ost->audio_resample = 1;
resample_changed = ost->resample_sample_fmt != dec->sample_fmt ||
ost->resample_channels != dec->channels ||
ost->resample_sample_rate != dec->sample_rate;
if ((ost->audio_resample && !ost->swr) || resample_changed || ost->audio_channels_mapped) {
if (resample_changed) {
av_log(NULL, AV_LOG_INFO, "Input stream #%d:%d frame changed from rate:%d fmt:%s ch:%d to rate:%d fmt:%s ch:%d\n",
ist->file_index, ist->st->index,
ost->resample_sample_rate, av_get_sample_fmt_name(ost->resample_sample_fmt), ost->resample_channels,
dec->sample_rate, av_get_sample_fmt_name(dec->sample_fmt), dec->channels);
ost->resample_sample_fmt = dec->sample_fmt;
ost->resample_channels = dec->channels;
ost->resample_sample_rate = dec->sample_rate;
swr_free(&ost->swr);
}
/* if audio_sync_method is >1 the resampler is needed for audio drift compensation */
if (audio_sync_method <= 1 && !ost->audio_channels_mapped &&
ost->resample_sample_fmt == enc->sample_fmt &&
ost->resample_channels == enc->channels &&
ost->resample_sample_rate == enc->sample_rate) {
//ost->swr = NULL;
ost->audio_resample = 0;
} else {
ost->swr = swr_alloc2(ost->swr,
enc->channel_layout, enc->sample_fmt, enc->sample_rate,
dec->channel_layout, dec->sample_fmt, dec->sample_rate,
ost->audio_channels_mapped ? ost->audio_channels_map : NULL,
0, NULL);
av_opt_set_double(ost->swr, "rmvol", ost->rematrix_volume, 0);
if (ost->audio_channels_mapped) {
av_opt_set_int(ost->swr, "icl", av_get_default_channel_layout(ost->audio_channels_mapped), 0);
av_opt_set_int(ost->swr, "uch", ost->audio_channels_mapped, 0);
}
av_opt_set_int(ost->swr, "ich", dec->channels, 0);
av_opt_set_int(ost->swr, "och", enc->channels, 0);
if(audio_sync_method>1) av_opt_set_int(ost->swr, "flags", SWR_FLAG_RESAMPLE, 0);
if(ost->swr && swr_init(ost->swr) < 0){
av_log(NULL, AV_LOG_FATAL, "swr_init() failed\n");
swr_free(&ost->swr);
}
if (!ost->swr) {
av_log(NULL, AV_LOG_FATAL, "Can not resample %d channels @ %d Hz to %d channels @ %d Hz\n",
dec->channels, dec->sample_rate,
enc->channels, enc->sample_rate);
exit_program(1);
}
}
}
av_assert0(ost->audio_resample || dec->sample_fmt==enc->sample_fmt);
if(audio_sync_method){
double delta = get_sync_ipts(ost) * enc->sample_rate - ost->sync_opts
- av_fifo_size(ost->fifo)/(enc->channels * 2);
double idelta= delta*dec->sample_rate / enc->sample_rate;
int byte_delta= ((int)idelta)*2*dec->channels;
//FIXME resample delay
if(fabs(delta) > 50){
if(ist->is_start || fabs(delta) > audio_drift_threshold*enc->sample_rate){
if(byte_delta < 0){
byte_delta= FFMAX(byte_delta, -size);
size += byte_delta;
buf -= byte_delta;
av_log(NULL, AV_LOG_VERBOSE, "discarding %d audio samples\n", (int)-delta);
if(!size)
return;
ist->is_start=0;
}else{
input_tmp= av_realloc(input_tmp, byte_delta + size);
if(byte_delta > allocated_for_size - size){
allocated_for_size= byte_delta + (int64_t)size;
goto need_realloc;
}
ist->is_start=0;
memset(input_tmp, 0, byte_delta);
memcpy(input_tmp + byte_delta, buf, size);
buf= input_tmp;
size += byte_delta;
av_log(NULL, AV_LOG_VERBOSE, "adding %d audio samples of silence\n", (int)delta);
}
}else if(audio_sync_method>1){
int comp= av_clip(delta, -audio_sync_method, audio_sync_method);
av_assert0(ost->audio_resample);
av_log(NULL, AV_LOG_VERBOSE, "compensating audio timestamp drift:%f compensation:%d in:%d\n",
delta, comp, enc->sample_rate);
// fprintf(stderr, "drift:%f len:%d opts:%"PRId64" ipts:%"PRId64" fifo:%d\n", delta, -1, ost->sync_opts, (int64_t)(get_sync_ipts(ost) * enc->sample_rate), av_fifo_size(ost->fifo)/(ost->st->codec->channels * 2));
swr_compensate(ost->swr, comp, enc->sample_rate);
}
}
}else
ost->sync_opts= lrintf(get_sync_ipts(ost) * enc->sample_rate)
- av_fifo_size(ost->fifo)/(enc->channels * 2); //FIXME wrong
if (ost->audio_resample) {
buftmp = audio_buf;
size_out = swr_convert(ost->swr, ( uint8_t*[]){buftmp}, audio_buf_size / (enc->channels * osize),
(const uint8_t*[]){buf }, size / (dec->channels * isize));
size_out = size_out * enc->channels * osize;
} else {
buftmp = buf;
size_out = size;
}
av_assert0(ost->audio_resample || dec->sample_fmt==enc->sample_fmt);
/* 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) {
av_log(NULL, AV_LOG_FATAL, "av_fifo_realloc2() failed\n");
exit_program(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_generic_read(ost->fifo, audio_buf, frame_bytes, NULL);
//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);