ref: 0fbb694feda4ab4841a07762c7767301f3a68baf
dir: /src/io/source_avcodec.c/
/*
Copyright (C) 2013 Paul Brossier <piem@aubio.org>
This file is part of aubio.
aubio is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
aubio 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with aubio. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#ifdef HAVE_LIBAV
// determine whether we use libavformat from ffmpe or libav
#define FFMPEG_LIBAVFORMAT (LIBAVFORMAT_VERSION_MICRO > 99)
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libavresample/avresample.h>
#include <libavutil/opt.h>
#include <stdlib.h>
#include "aubio_priv.h"
#include "fvec.h"
#include "fmat.h"
#include "source_avcodec.h"
#define AUBIO_AVCODEC_MAX_BUFFER_SIZE FF_MIN_BUFFER_SIZE
struct _aubio_source_avcodec_t {
uint_t hop_size;
uint_t samplerate;
uint_t channels;
// some data about the file
char_t *path;
uint_t input_samplerate;
uint_t input_channels;
// avcodec stuff
AVFormatContext *avFormatCtx;
AVCodecContext *avCodecCtx;
AVFrame *avFrame;
AVAudioResampleContext *avr;
float *output;
uint_t read_samples;
uint_t read_index;
sint_t selected_stream;
uint_t eof;
uint_t multi;
};
// hack to create or re-create the context the first time _do or _do_multi is called
void aubio_source_avcodec_reset_resampler(aubio_source_avcodec_t * s, uint_t multi);
void aubio_source_avcodec_readframe(aubio_source_avcodec_t *s, uint_t * read_samples);
aubio_source_avcodec_t * new_aubio_source_avcodec(const char_t * path, uint_t samplerate, uint_t hop_size) {
aubio_source_avcodec_t * s = AUBIO_NEW(aubio_source_avcodec_t);
int err;
if (path == NULL) {
AUBIO_ERR("source_avcodec: Aborted opening null path\n");
goto beach;
}
if ((sint_t)samplerate < 0) {
AUBIO_ERR("source_avcodec: Can not open %s with samplerate %d\n", path, samplerate);
goto beach;
}
if ((sint_t)hop_size <= 0) {
AUBIO_ERR("source_avcodec: Can not open %s with hop_size %d\n", path, hop_size);
goto beach;
}
s->hop_size = hop_size;
s->channels = 1;
if (s->path) AUBIO_FREE(s->path);
s->path = AUBIO_ARRAY(char_t, strnlen(path, PATH_MAX) + 1);
strncpy(s->path, path, strnlen(path, PATH_MAX) + 1);
// register all formats and codecs
av_register_all();
// if path[0] != '/'
//avformat_network_init();
// try opening the file and get some info about it
AVFormatContext *avFormatCtx = s->avFormatCtx;
avFormatCtx = NULL;
if ( (err = avformat_open_input(&avFormatCtx, s->path, NULL, NULL) ) < 0 ) {
char errorstr[256];
av_strerror (err, errorstr, sizeof(errorstr));
AUBIO_ERR("source_avcodec: Failed opening %s (%s)\n", s->path, errorstr);
goto beach;
}
// try to make sure max_analyze_duration is big enough for most songs
#if FFMPEG_LIBAVFORMAT
avFormatCtx->max_analyze_duration2 *= 100;
#else
avFormatCtx->max_analyze_duration *= 100;
#endif
// retrieve stream information
if ( (err = avformat_find_stream_info(avFormatCtx, NULL)) < 0 ) {
char errorstr[256];
av_strerror (err, errorstr, sizeof(errorstr));
AUBIO_ERR("source_avcodec: Could not find stream information " "for %s (%s)\n", s->path,
errorstr);
goto beach;
}
// dump information about file onto standard error
//av_dump_format(avFormatCtx, 0, s->path, 0);
// look for the first audio stream
uint_t i;
sint_t selected_stream = -1;
for (i = 0; i < avFormatCtx->nb_streams; i++) {
if (avFormatCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
if (selected_stream == -1) {
selected_stream = i;
} else {
AUBIO_WRN("source_avcodec: More than one audio stream in %s, "
"taking the first one\n", s->path);
}
}
}
if (selected_stream == -1) {
AUBIO_ERR("source_avcodec: No audio stream in %s\n", s->path);
goto beach;
}
//AUBIO_DBG("Taking stream %d in file %s\n", selected_stream, s->path);
s->selected_stream = selected_stream;
AVCodecContext *avCodecCtx = s->avCodecCtx;
avCodecCtx = avFormatCtx->streams[selected_stream]->codec;
AVCodec *codec = avcodec_find_decoder(avCodecCtx->codec_id);
if (codec == NULL) {
AUBIO_ERR("source_avcodec: Could not find decoder for %s", s->path);
goto beach;
}
if ( ( err = avcodec_open2(avCodecCtx, codec, NULL) ) < 0) {
char errorstr[256];
av_strerror (err, errorstr, sizeof(errorstr));
AUBIO_ERR("source_avcodec: Could not load codec for %s (%s)\n", s->path, errorstr);
goto beach;
}
/* get input specs */
s->input_samplerate = avCodecCtx->sample_rate;
s->input_channels = avCodecCtx->channels;
//AUBIO_DBG("input_samplerate: %d\n", s->input_samplerate);
//AUBIO_DBG("input_channels: %d\n", s->input_channels);
if (samplerate == 0) {
s->samplerate = s->input_samplerate;
} else {
s->samplerate = samplerate;
}
if (s->samplerate > s->input_samplerate) {
AUBIO_WRN("source_avcodec: upsampling %s from %d to %d\n", s->path,
s->input_samplerate, s->samplerate);
}
AVFrame *avFrame = s->avFrame;
avFrame = av_frame_alloc();
if (!avFrame) {
AUBIO_ERR("source_avcodec: Could not allocate frame for (%s)\n", s->path);
}
/* allocate output for avr */
s->output = (float *)av_malloc(AUBIO_AVCODEC_MAX_BUFFER_SIZE * sizeof(float));
s->read_samples = 0;
s->read_index = 0;
s->avFormatCtx = avFormatCtx;
s->avCodecCtx = avCodecCtx;
s->avFrame = avFrame;
// default to mono output
aubio_source_avcodec_reset_resampler(s, 0);
s->eof = 0;
s->multi = 0;
//av_log_set_level(AV_LOG_QUIET);
return s;
beach:
//AUBIO_ERR("can not read %s at samplerate %dHz with a hop_size of %d\n",
// s->path, s->samplerate, s->hop_size);
del_aubio_source_avcodec(s);
return NULL;
}
void aubio_source_avcodec_reset_resampler(aubio_source_avcodec_t * s, uint_t multi) {
if ( (multi != s->multi) || (s->avr == NULL) ) {
int64_t input_layout = av_get_default_channel_layout(s->input_channels);
uint_t output_channels = multi ? s->input_channels : 1;
int64_t output_layout = av_get_default_channel_layout(output_channels);
if (s->avr != NULL) {
avresample_close( s->avr );
av_free ( s->avr );
s->avr = NULL;
}
AVAudioResampleContext *avr = s->avr;
avr = avresample_alloc_context();
av_opt_set_int(avr, "in_channel_layout", input_layout, 0);
av_opt_set_int(avr, "out_channel_layout", output_layout, 0);
av_opt_set_int(avr, "in_sample_rate", s->input_samplerate, 0);
av_opt_set_int(avr, "out_sample_rate", s->samplerate, 0);
av_opt_set_int(avr, "in_sample_fmt", s->avCodecCtx->sample_fmt, 0);
av_opt_set_int(avr, "out_sample_fmt", AV_SAMPLE_FMT_FLT, 0);
int err;
if ( ( err = avresample_open(avr) ) < 0) {
char errorstr[256];
av_strerror (err, errorstr, sizeof(errorstr));
AUBIO_ERR("source_avcodec: Could not open AVAudioResampleContext for %s (%s)\n",
s->path, errorstr);
//goto beach;
return;
}
s->avr = avr;
s->multi = multi;
}
}
void aubio_source_avcodec_readframe(aubio_source_avcodec_t *s, uint_t * read_samples) {
AVFormatContext *avFormatCtx = s->avFormatCtx;
AVCodecContext *avCodecCtx = s->avCodecCtx;
AVFrame *avFrame = s->avFrame;
AVPacket avPacket;
av_init_packet (&avPacket);
AVAudioResampleContext *avr = s->avr;
float *output = s->output;
*read_samples = 0;
do
{
int err = av_read_frame (avFormatCtx, &avPacket);
if (err == AVERROR_EOF) {
s->eof = 1;
goto beach;
}
if (err != 0) {
char errorstr[256];
av_strerror (err, errorstr, sizeof(errorstr));
AUBIO_ERR("Could not read frame in %s (%s)\n", s->path, errorstr);
goto beach;
}
} while (avPacket.stream_index != s->selected_stream);
int got_frame = 0;
int len = avcodec_decode_audio4(avCodecCtx, avFrame, &got_frame, &avPacket);
if (len < 0) {
AUBIO_ERR("Error while decoding %s\n", s->path);
goto beach;
}
if (got_frame == 0) {
//AUBIO_ERR("Could not get frame for (%s)\n", s->path);
goto beach;
}
int in_linesize = 0;
av_samples_get_buffer_size(&in_linesize, avCodecCtx->channels,
avFrame->nb_samples, avCodecCtx->sample_fmt, 1);
int in_samples = avFrame->nb_samples;
int out_linesize = 0;
int max_out_samples = AUBIO_AVCODEC_MAX_BUFFER_SIZE;
int out_samples = avresample_convert ( avr,
(uint8_t **)&output, out_linesize, max_out_samples,
(uint8_t **)avFrame->data, in_linesize, in_samples);
if (out_samples <= 0) {
//AUBIO_ERR("No sample found while converting frame (%s)\n", s->path);
goto beach;
}
*read_samples = out_samples;
beach:
s->avFormatCtx = avFormatCtx;
s->avCodecCtx = avCodecCtx;
s->avFrame = avFrame;
s->avr = avr;
s->output = output;
av_free_packet(&avPacket);
}
void aubio_source_avcodec_do(aubio_source_avcodec_t * s, fvec_t * read_data, uint_t * read){
if (s->multi == 1) aubio_source_avcodec_reset_resampler(s, 0);
uint_t i;
uint_t end = 0;
uint_t total_wrote = 0;
while (total_wrote < s->hop_size) {
end = MIN(s->read_samples - s->read_index, s->hop_size - total_wrote);
for (i = 0; i < end; i++) {
read_data->data[i + total_wrote] = s->output[i + s->read_index];
}
total_wrote += end;
if (total_wrote < s->hop_size) {
uint_t avcodec_read = 0;
aubio_source_avcodec_readframe(s, &avcodec_read);
s->read_samples = avcodec_read;
s->read_index = 0;
if (s->eof) {
break;
}
} else {
s->read_index += end;
}
}
if (total_wrote < s->hop_size) {
for (i = end; i < s->hop_size; i++) {
read_data->data[i] = 0.;
}
}
*read = total_wrote;
}
void aubio_source_avcodec_do_multi(aubio_source_avcodec_t * s, fmat_t * read_data, uint_t * read){
if (s->multi == 0) aubio_source_avcodec_reset_resampler(s, 1);
uint_t i,j;
uint_t end = 0;
uint_t total_wrote = 0;
while (total_wrote < s->hop_size) {
end = MIN(s->read_samples - s->read_index, s->hop_size - total_wrote);
for (j = 0; j < read_data->height; j++) {
for (i = 0; i < end; i++) {
read_data->data[j][i + total_wrote] =
s->output[(i + s->read_index) * s->input_channels + j];
}
}
total_wrote += end;
if (total_wrote < s->hop_size) {
uint_t avcodec_read = 0;
aubio_source_avcodec_readframe(s, &avcodec_read);
s->read_samples = avcodec_read;
s->read_index = 0;
if (s->eof) {
break;
}
} else {
s->read_index += end;
}
}
if (total_wrote < s->hop_size) {
for (j = 0; j < read_data->height; j++) {
for (i = end; i < s->hop_size; i++) {
read_data->data[j][i] = 0.;
}
}
}
*read = total_wrote;
}
uint_t aubio_source_avcodec_get_samplerate(const aubio_source_avcodec_t * s) {
return s->samplerate;
}
uint_t aubio_source_avcodec_get_channels(const aubio_source_avcodec_t * s) {
return s->input_channels;
}
uint_t aubio_source_avcodec_seek (aubio_source_avcodec_t * s, uint_t pos) {
int64_t resampled_pos = (uint_t)ROUND(pos * (s->input_samplerate * 1. / s->samplerate));
int64_t min_ts = MAX(resampled_pos - 2000, 0);
int64_t max_ts = MIN(resampled_pos + 2000, INT64_MAX);
int seek_flags = AVSEEK_FLAG_FRAME | AVSEEK_FLAG_ANY;
int ret = avformat_seek_file(s->avFormatCtx, s->selected_stream,
min_ts, resampled_pos, max_ts, seek_flags);
if (ret < 0) {
AUBIO_ERR("Failed seeking to %d in file %s", pos, s->path);
}
// reset read status
s->eof = 0;
s->read_index = 0;
s->read_samples = 0;
// reset the AVAudioResampleContext
avresample_close(s->avr);
avresample_open(s->avr);
return ret;
}
uint_t aubio_source_avcodec_get_duration (aubio_source_avcodec_t * s) {
if (s && &(s->avFormatCtx) != NULL) {
int64_t duration = s->avFormatCtx->duration;
return s->samplerate * ((uint_t)duration / 1e6 );
}
return 0;
}
uint_t aubio_source_avcodec_close(aubio_source_avcodec_t * s) {
if (s->avr != NULL) {
avresample_close( s->avr );
av_free ( s->avr );
}
s->avr = NULL;
if (s->avCodecCtx != NULL) {
avcodec_close ( s->avCodecCtx );
}
s->avCodecCtx = NULL;
if (s->avFormatCtx != NULL) {
avformat_close_input ( &(s->avFormatCtx) );
}
s->avFormatCtx = NULL;
return AUBIO_OK;
}
void del_aubio_source_avcodec(aubio_source_avcodec_t * s){
if (!s) return;
aubio_source_avcodec_close(s);
if (s->output != NULL) {
av_free(s->output);
}
s->output = NULL;
if (s->avFrame != NULL) {
av_frame_free( &(s->avFrame) );
}
if (s->path) AUBIO_FREE(s->path);
s->avFrame = NULL;
AUBIO_FREE(s);
}
#endif /* HAVE_LIBAV */