blender/intern/audaspace/ffmpeg/AUD_FFMPEGReader.cpp
Brecht Van Lommel 9a85013692 Merge various small changes from render branch:
* Division by zero fix for TNT SVD code.
* Sound fix, in case ffmpeg decode fails, don't use the samples.
* Fix for incorrect bounds of transformed objects in new raytracing code.
* Gave memory arena's a name used for allocations for easier memory
  usage debugging.
* Dupligroup no_draw option was using layers but not restrict view/render
  setting. (not a bugfix exactly but would do display list context switching
  while drawing for no reason).
* Fix objects instanced on hair particles not giving consistent results
  when the object is transformed.
* New math functions: madd_v4_v4fl, len_squared_v3v3, interp_v4_v4v4v4,
  mul_v4_m4v4, SH and form factor functions, box_minmax_bounds_m4.
* mul_m4_m4m4 and mul_m3_m3m3 now accept the same pointers for multiple
  arguments.
* endjob callback for WM jobs system.
* Geometry node uv/color layer now has search list/autocomplete.
* Various small buildsystem tweaks, not strictly needed yet in trunk.
2010-04-15 10:28:32 +00:00

366 lines
8.5 KiB
C++

/*
* $Id$
*
* ***** BEGIN LGPL LICENSE BLOCK *****
*
* Copyright 2009 Jörg Hermann Müller
*
* This file is part of AudaSpace.
*
* AudaSpace 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 3 of the License, or
* (at your option) any later version.
*
* AudaSpace 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 AudaSpace. If not, see <http://www.gnu.org/licenses/>.
*
* ***** END LGPL LICENSE BLOCK *****
*/
// needed for INT64_C
#define __STDC_CONSTANT_MACROS
#include "AUD_FFMPEGReader.h"
#include "AUD_Buffer.h"
extern "C" {
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
}
int AUD_FFMPEGReader::decode(AVPacket* packet, AUD_Buffer* buffer)
{
// save packet parameters
uint8_t *audio_pkg_data = packet->data;
int audio_pkg_size = packet->size;
int buf_size = buffer->getSize();
int buf_pos = 0;
int read_length, data_size;
// as long as there is still data in the package
while(audio_pkg_size > 0)
{
// resize buffer if needed
if(buf_size - buf_pos < AVCODEC_MAX_AUDIO_FRAME_SIZE)
{
buffer->resize(buf_size + AVCODEC_MAX_AUDIO_FRAME_SIZE, true);
buf_size += AVCODEC_MAX_AUDIO_FRAME_SIZE;
}
// read samples from the packet
data_size = buf_size - buf_pos;
/*read_length = avcodec_decode_audio3(m_codecCtx,
(int16_t*)(((data_t*)buffer->getBuffer())+buf_pos),
&data_size,
packet);*/
read_length = avcodec_decode_audio2(m_codecCtx,
(int16_t*)(((data_t*)buffer->getBuffer())+buf_pos),
&data_size,
audio_pkg_data,
audio_pkg_size);
// read error, next packet!
if(read_length < 0)
break;
buf_pos += data_size;
// move packet parameters
audio_pkg_data += read_length;
audio_pkg_size -= read_length;
}
return buf_pos;
}
void AUD_FFMPEGReader::init()
{
m_position = 0;
m_pkgbuf_left = 0;
if(av_find_stream_info(m_formatCtx)<0)
AUD_THROW(AUD_ERROR_FFMPEG);
// find audio stream and codec
m_stream = -1;
for(unsigned int i = 0; i < m_formatCtx->nb_streams; i++)
if((m_formatCtx->streams[i]->codec->codec_type == CODEC_TYPE_AUDIO)
&& (m_stream < 0))
{
m_stream=i;
break;
}
if(m_stream == -1)
AUD_THROW(AUD_ERROR_FFMPEG);
m_codecCtx = m_formatCtx->streams[m_stream]->codec;
// get a decoder and open it
AVCodec *aCodec = avcodec_find_decoder(m_codecCtx->codec_id);
if(!aCodec)
AUD_THROW(AUD_ERROR_FFMPEG);
if(avcodec_open(m_codecCtx, aCodec)<0)
AUD_THROW(AUD_ERROR_FFMPEG);
// XXX this prints file information to stdout:
//dump_format(m_formatCtx, 0, NULL, 0);
m_specs.channels = (AUD_Channels) m_codecCtx->channels;
switch(m_codecCtx->sample_fmt)
{
case SAMPLE_FMT_U8:
m_convert = AUD_convert_u8_float;
m_specs.format = AUD_FORMAT_U8;
break;
case SAMPLE_FMT_S16:
m_convert = AUD_convert_s16_float;
m_specs.format = AUD_FORMAT_S16;
break;
case SAMPLE_FMT_S32:
m_convert = AUD_convert_s32_float;
m_specs.format = AUD_FORMAT_S32;
break;
case SAMPLE_FMT_FLT:
m_convert = AUD_convert_copy<float>;
m_specs.format = AUD_FORMAT_FLOAT32;
break;
case SAMPLE_FMT_DBL:
m_convert = AUD_convert_double_float;
m_specs.format = AUD_FORMAT_FLOAT64;
break;
default:
AUD_THROW(AUD_ERROR_FILE);
}
m_specs.rate = (AUD_SampleRate) m_codecCtx->sample_rate;
// last but not least if there hasn't been any error, create the buffers
m_buffer = new AUD_Buffer(); AUD_NEW("buffer")
m_pkgbuf = new AUD_Buffer(AVCODEC_MAX_AUDIO_FRAME_SIZE<<1);
AUD_NEW("buffer")
}
AUD_FFMPEGReader::AUD_FFMPEGReader(const char* filename)
{
m_byteiocontext = NULL;
// open file
if(av_open_input_file(&m_formatCtx, filename, NULL, 0, NULL)!=0)
AUD_THROW(AUD_ERROR_FILE);
try
{
init();
}
catch(AUD_Exception)
{
av_close_input_file(m_formatCtx);
throw;
}
}
AUD_FFMPEGReader::AUD_FFMPEGReader(AUD_Reference<AUD_Buffer> buffer)
{
m_byteiocontext = (ByteIOContext*)av_mallocz(sizeof(ByteIOContext));
AUD_NEW("byteiocontext")
m_membuffer = buffer;
if(init_put_byte(m_byteiocontext, (data_t*)buffer.get()->getBuffer(),
buffer.get()->getSize(), 0, NULL, NULL, NULL, NULL) != 0)
AUD_THROW(AUD_ERROR_FILE);
AVProbeData probe_data;
probe_data.filename = "";
probe_data.buf = (data_t*)buffer.get()->getBuffer();
probe_data.buf_size = buffer.get()->getSize();
AVInputFormat* fmt = av_probe_input_format(&probe_data, 1);
// open stream
if(av_open_input_stream(&m_formatCtx, m_byteiocontext, "", fmt, NULL)!=0)
AUD_THROW(AUD_ERROR_FILE);
try
{
init();
}
catch(AUD_Exception)
{
av_close_input_stream(m_formatCtx);
av_free(m_byteiocontext); AUD_DELETE("byteiocontext")
throw;
}
}
AUD_FFMPEGReader::~AUD_FFMPEGReader()
{
avcodec_close(m_codecCtx);
if(m_byteiocontext)
{
av_close_input_stream(m_formatCtx);
av_free(m_byteiocontext); AUD_DELETE("byteiocontext")
}
else
av_close_input_file(m_formatCtx);
delete m_buffer; AUD_DELETE("buffer")
delete m_pkgbuf; AUD_DELETE("buffer")
}
bool AUD_FFMPEGReader::isSeekable()
{
return true;
}
void AUD_FFMPEGReader::seek(int position)
{
if(position >= 0)
{
// a value < 0 tells us that seeking failed
if(av_seek_frame(m_formatCtx,
-1,
(uint64_t)(((uint64_t)position *
(uint64_t)AV_TIME_BASE) /
(uint64_t)m_specs.rate),
AVSEEK_FLAG_BACKWARD | AVSEEK_FLAG_ANY) >= 0)
{
avcodec_flush_buffers(m_codecCtx);
m_position = position;
AVPacket packet;
bool search = true;
while(search && av_read_frame(m_formatCtx, &packet) >= 0)
{
// is it a frame from the audio stream?
if(packet.stream_index == m_stream)
{
// decode the package
m_pkgbuf_left = decode(&packet, m_pkgbuf);
search = false;
// check position
if(packet.pts != AV_NOPTS_VALUE)
{
// calculate real position, and read to frame!
m_position = packet.pts *
av_q2d(m_formatCtx->streams[m_stream]->time_base) *
m_specs.rate;
if(m_position < position)
{
sample_t* buf;
int length = position - m_position;
read(length, buf);
}
}
}
av_free_packet(&packet);
}
}
else
{
// Seeking failed, do nothing.
}
}
}
int AUD_FFMPEGReader::getLength()
{
// return approximated remaning size
return (int)((m_formatCtx->duration * m_codecCtx->sample_rate)
/ AV_TIME_BASE)-m_position;
}
int AUD_FFMPEGReader::getPosition()
{
return m_position;
}
AUD_Specs AUD_FFMPEGReader::getSpecs()
{
return m_specs.specs;
}
AUD_ReaderType AUD_FFMPEGReader::getType()
{
return AUD_TYPE_STREAM;
}
bool AUD_FFMPEGReader::notify(AUD_Message &message)
{
return false;
}
void AUD_FFMPEGReader::read(int & length, sample_t* & buffer)
{
// read packages and decode them
AVPacket packet;
int data_size = 0;
int pkgbuf_pos;
int left = length;
int sample_size = AUD_DEVICE_SAMPLE_SIZE(m_specs);
// resize output buffer if necessary
if(m_buffer->getSize() < length * AUD_SAMPLE_SIZE(m_specs))
m_buffer->resize(length * AUD_SAMPLE_SIZE(m_specs));
buffer = m_buffer->getBuffer();
pkgbuf_pos = m_pkgbuf_left;
m_pkgbuf_left = 0;
// there may still be data in the buffer from the last call
if(pkgbuf_pos > 0)
{
data_size = AUD_MIN(pkgbuf_pos, left * sample_size);
m_convert((data_t*) buffer, (data_t*) m_pkgbuf->getBuffer(),
data_size / AUD_FORMAT_SIZE(m_specs.format));
buffer += data_size / AUD_FORMAT_SIZE(m_specs.format);
left -= data_size/sample_size;
}
// for each frame read as long as there isn't enough data already
while((left > 0) && (av_read_frame(m_formatCtx, &packet) >= 0))
{
// is it a frame from the audio stream?
if(packet.stream_index == m_stream)
{
// decode the package
pkgbuf_pos = decode(&packet, m_pkgbuf);
// copy to output buffer
data_size = AUD_MIN(pkgbuf_pos, left * sample_size);
m_convert((data_t*) buffer, (data_t*) m_pkgbuf->getBuffer(),
data_size / AUD_FORMAT_SIZE(m_specs.format));
buffer += data_size / AUD_FORMAT_SIZE(m_specs.format);
left -= data_size/sample_size;
}
av_free_packet(&packet);
}
// read more data than necessary?
if(pkgbuf_pos > data_size)
{
m_pkgbuf_left = pkgbuf_pos-data_size;
memmove(m_pkgbuf->getBuffer(),
((data_t*)m_pkgbuf->getBuffer())+data_size,
pkgbuf_pos-data_size);
}
buffer = m_buffer->getBuffer();
if(left > 0)
length -= left;
m_position += length;
}