339 lines
9.7 KiB
Objective-C
339 lines
9.7 KiB
Objective-C
//
|
|
// FFMPEGDecoder.m
|
|
// FFMPEG
|
|
//
|
|
// Created by Andre Reffhaug on 2/26/08.
|
|
// Copyright 2008 __MyCompanyName__. All rights reserved.
|
|
//
|
|
|
|
// test
|
|
#import "FFMPEGDecoder.h"
|
|
#import "FFMPEGFileProtocols.h"
|
|
|
|
#include <pthread.h>
|
|
|
|
#import "Logging.h"
|
|
|
|
#define ST_BUFF 2048
|
|
|
|
@implementation FFMPEGDecoder
|
|
|
|
|
|
int lockmgr_callback(void ** mutex, enum AVLockOp op)
|
|
{
|
|
switch (op)
|
|
{
|
|
case AV_LOCK_CREATE:
|
|
*mutex = malloc(sizeof(pthread_mutex_t));
|
|
pthread_mutex_init(*mutex, NULL);
|
|
break;
|
|
|
|
case AV_LOCK_DESTROY:
|
|
pthread_mutex_destroy(*mutex);
|
|
free(*mutex);
|
|
*mutex = NULL;
|
|
break;
|
|
|
|
case AV_LOCK_OBTAIN:
|
|
pthread_mutex_lock(*mutex);
|
|
break;
|
|
|
|
case AV_LOCK_RELEASE:
|
|
pthread_mutex_unlock(*mutex);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
+ (void)initialize
|
|
{
|
|
if(self == [FFMPEGDecoder class])
|
|
{
|
|
av_log_set_flags(AV_LOG_SKIP_REPEATED);
|
|
av_log_set_level(AV_LOG_ERROR);
|
|
av_register_all();
|
|
registerCogProtocols();
|
|
av_lockmgr_register(lockmgr_callback);
|
|
}
|
|
}
|
|
|
|
- (BOOL)open:(id<CogSource>)s
|
|
{
|
|
int errcode, i;
|
|
const char *filename = [[[[s url] absoluteString] stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding] UTF8String];
|
|
|
|
formatCtx = NULL;
|
|
totalFrames = 0;
|
|
framesRead = 0;
|
|
|
|
// register all available codecs
|
|
|
|
if ((errcode = avformat_open_input(&formatCtx, filename, NULL, NULL)) < 0)
|
|
{
|
|
char errDescr[4096];
|
|
av_strerror(errcode, errDescr, 4096);
|
|
ALog(@"ERROR OPENING FILE, errcode = %d, error = %s", errcode, errDescr);
|
|
return NO;
|
|
}
|
|
|
|
if(avformat_find_stream_info(formatCtx, NULL) < 0)
|
|
{
|
|
ALog(@"CAN'T FIND STREAM INFO!");
|
|
return NO;
|
|
}
|
|
|
|
streamIndex = -1;
|
|
for(i = 0; i < formatCtx->nb_streams; i++) {
|
|
codecCtx = formatCtx->streams[i]->codec;
|
|
if(codecCtx->codec_type == AVMEDIA_TYPE_AUDIO)
|
|
{
|
|
DLog(@"audio codec found");
|
|
streamIndex = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if ( streamIndex < 0 ) {
|
|
ALog(@"no audio codec found");
|
|
return NO;
|
|
}
|
|
|
|
AVCodec * codec = avcodec_find_decoder(codecCtx->codec_id);
|
|
if (!codec) {
|
|
ALog(@"codec not found");
|
|
return NO;
|
|
}
|
|
|
|
if (avcodec_open2(codecCtx, codec, NULL) < 0) {
|
|
ALog(@"could not open codec");
|
|
return NO;
|
|
}
|
|
|
|
lastDecodedFrame = avcodec_alloc_frame();
|
|
avcodec_get_frame_defaults(lastDecodedFrame);
|
|
lastReadPacket = malloc(sizeof(AVPacket));
|
|
av_new_packet(lastReadPacket, 0);
|
|
readNextPacket = YES;
|
|
bytesConsumedFromDecodedFrame = INT_MAX;
|
|
|
|
frequency = codecCtx->sample_rate;
|
|
channels = codecCtx->channels;
|
|
floatingPoint = NO;
|
|
|
|
switch (codecCtx->sample_fmt) {
|
|
case AV_SAMPLE_FMT_U8:
|
|
case AV_SAMPLE_FMT_U8P:
|
|
bitsPerSample = 8;
|
|
break;
|
|
|
|
case AV_SAMPLE_FMT_S16:
|
|
case AV_SAMPLE_FMT_S16P:
|
|
bitsPerSample = 16;
|
|
break;
|
|
|
|
case AV_SAMPLE_FMT_S32:
|
|
case AV_SAMPLE_FMT_S32P:
|
|
bitsPerSample = 32;
|
|
break;
|
|
|
|
case AV_SAMPLE_FMT_FLT:
|
|
case AV_SAMPLE_FMT_FLTP:
|
|
bitsPerSample = 32;
|
|
floatingPoint = YES;
|
|
break;
|
|
|
|
case AV_SAMPLE_FMT_DBL:
|
|
case AV_SAMPLE_FMT_DBLP:
|
|
bitsPerSample = 64;
|
|
floatingPoint = YES;
|
|
break;
|
|
|
|
default:
|
|
return NO;
|
|
}
|
|
|
|
totalFrames = codecCtx->sample_rate * ((float)formatCtx->duration/AV_TIME_BASE);
|
|
bitrate = (codecCtx->bit_rate) / 1000;
|
|
framesRead = 0;
|
|
|
|
seekable = [s seekable];
|
|
|
|
return YES;
|
|
}
|
|
|
|
- (void)close
|
|
{
|
|
if (lastReadPacket)
|
|
{
|
|
av_free_packet(lastReadPacket);
|
|
free(lastReadPacket);
|
|
lastReadPacket = NULL;
|
|
}
|
|
|
|
if (lastDecodedFrame) { av_free(lastDecodedFrame); lastDecodedFrame = NULL; }
|
|
|
|
if (codecCtx) { avcodec_close(codecCtx); codecCtx = NULL; }
|
|
|
|
if (formatCtx) { avformat_close_input(&(formatCtx)); formatCtx = NULL; }
|
|
}
|
|
|
|
- (int)readAudio:(void *)buf frames:(UInt32)frames
|
|
{
|
|
int frameSize = channels * (bitsPerSample / 8);
|
|
int gotFrame = 0;
|
|
int dataSize = 0;
|
|
|
|
int bytesToRead = frames * frameSize;
|
|
int bytesRead = 0;
|
|
|
|
BOOL endOfStream = NO;
|
|
|
|
int8_t* targetBuf = (int8_t*) buf;
|
|
memset(buf, 0, bytesToRead);
|
|
|
|
while (bytesRead < bytesToRead)
|
|
{
|
|
|
|
// buffer size needed to hold decoded samples, in bytes
|
|
int planeSize;
|
|
int planar = av_sample_fmt_is_planar(codecCtx->sample_fmt);
|
|
dataSize = av_samples_get_buffer_size(&planeSize, codecCtx->channels,
|
|
lastDecodedFrame->nb_samples,
|
|
codecCtx->sample_fmt, 1);
|
|
|
|
if(readNextPacket && !endOfStream)
|
|
{
|
|
// consume next chunk of encoded data from input stream
|
|
av_free_packet(lastReadPacket);
|
|
if(av_read_frame(formatCtx, lastReadPacket) < 0)
|
|
{
|
|
DLog(@"End of stream");
|
|
endOfStream = YES;
|
|
if (dataSize <= bytesConsumedFromDecodedFrame)
|
|
break; // end of stream;
|
|
}
|
|
|
|
readNextPacket = NO; // we probably won't need to consume another chunk
|
|
bytesReadFromPacket = 0; // until this one is fully decoded
|
|
}
|
|
|
|
if (dataSize <= bytesConsumedFromDecodedFrame)
|
|
{
|
|
if (endOfStream)
|
|
break;
|
|
|
|
// consumed all decoded samples - decode more
|
|
avcodec_get_frame_defaults(lastDecodedFrame);
|
|
bytesConsumedFromDecodedFrame = 0;
|
|
int len = avcodec_decode_audio4(codecCtx, lastDecodedFrame, &gotFrame, lastReadPacket);
|
|
if (len < 0 || (!gotFrame))
|
|
{
|
|
char errbuf[4096];
|
|
av_strerror(len, errbuf, 4096);
|
|
ALog(@"Error decoding: len = %d, gotFrame = %d, strerr = %s", len, gotFrame, errbuf);
|
|
|
|
dataSize = 0;
|
|
readNextPacket = YES;
|
|
}
|
|
else
|
|
{
|
|
// Something has been successfully decoded
|
|
dataSize = av_samples_get_buffer_size(&planeSize, codecCtx->channels,
|
|
lastDecodedFrame->nb_samples,
|
|
codecCtx->sample_fmt, 1);
|
|
bytesReadFromPacket += len;
|
|
}
|
|
|
|
if (bytesReadFromPacket >= lastReadPacket->size)
|
|
{
|
|
// decoding consumed all the read packet - read another next time
|
|
readNextPacket = YES;
|
|
}
|
|
else
|
|
{
|
|
lastReadPacket->data += len;
|
|
lastReadPacket->size -= len;
|
|
}
|
|
}
|
|
|
|
int toConsume = FFMIN((dataSize - bytesConsumedFromDecodedFrame), (bytesToRead - bytesRead));
|
|
|
|
// copy decoded samples to Cog's buffer
|
|
if (!planar || channels == 1) {
|
|
memmove(targetBuf + bytesRead, (lastDecodedFrame->data[0] + bytesConsumedFromDecodedFrame), toConsume);
|
|
}
|
|
else {
|
|
uint8_t * out = ( uint8_t * ) targetBuf + bytesRead;
|
|
int bytesPerSample = bitsPerSample / 8;
|
|
int bytesConsumedPerPlane = bytesConsumedFromDecodedFrame / channels;
|
|
int toConsumePerPlane = toConsume / channels;
|
|
for (int s = 0; s < toConsumePerPlane; s += bytesPerSample) {
|
|
for (int ch = 0; ch < channels; ++ch) {
|
|
memcpy(out, lastDecodedFrame->extended_data[ch] + bytesConsumedPerPlane + s, bytesPerSample);
|
|
out += bytesPerSample;
|
|
}
|
|
}
|
|
}
|
|
|
|
bytesConsumedFromDecodedFrame += toConsume;
|
|
bytesRead += toConsume;
|
|
}
|
|
|
|
int framesReadNow = bytesRead / frameSize;
|
|
if ( framesRead + framesReadNow > totalFrames )
|
|
framesReadNow = totalFrames - framesRead;
|
|
|
|
framesRead += framesReadNow;
|
|
|
|
return framesReadNow;
|
|
}
|
|
|
|
- (long)seek:(long)frame
|
|
{
|
|
if (frame > totalFrames) { return -1; }
|
|
int64_t ts = frame * (formatCtx->duration) / totalFrames;
|
|
avformat_seek_file(formatCtx, -1, ts - 1000, ts, ts, AVSEEK_FLAG_ANY);
|
|
avcodec_flush_buffers(codecCtx);
|
|
readNextPacket = YES; // so we immediately read next packet
|
|
bytesConsumedFromDecodedFrame = INT_MAX; // so we immediately begin decoding next frame
|
|
|
|
return frame;
|
|
}
|
|
|
|
|
|
- (NSDictionary *)properties
|
|
{
|
|
return [NSDictionary dictionaryWithObjectsAndKeys:
|
|
[NSNumber numberWithInt:channels], @"channels",
|
|
[NSNumber numberWithInt:bitsPerSample], @"bitsPerSample",
|
|
[NSNumber numberWithBool:(bitsPerSample == 8)], @"Unsigned",
|
|
[NSNumber numberWithFloat:frequency], @"sampleRate",
|
|
[NSNumber numberWithBool:floatingPoint], @"floatingPoint",
|
|
[NSNumber numberWithDouble:totalFrames], @"totalFrames",
|
|
[NSNumber numberWithInt:bitrate], @"bitrate",
|
|
[NSNumber numberWithBool:seekable], @"seekable",
|
|
@"host", @"endian",
|
|
nil];
|
|
}
|
|
|
|
|
|
+ (NSArray *)fileTypes
|
|
{
|
|
return [NSArray arrayWithObjects:@"wma", @"asf", @"xwma", @"tak", @"mp3", @"mp2", @"m2a", @"mpa", @"ape", @"ac3", @"dts", @"dtshd", @"at3", @"wav", @"tta", nil];
|
|
}
|
|
|
|
+ (NSArray *)mimeTypes
|
|
{
|
|
return [NSArray arrayWithObjects:@"application/wma", @"application/x-wma", @"audio/x-wma", @"audio/x-ms-wma", @"audio/x-tak", @"audio/mpeg", @"audio/x-mp3", @"audio/x-mp2", @"audio/x-ape", @"audio/x-ac3", @"audio/x-dts", @"audio/x-dtshd", @"audio/x-at3", @"audio/wav", @"tta", nil];
|
|
}
|
|
|
|
+ (float)priority
|
|
{
|
|
return 1.0;
|
|
}
|
|
|
|
|
|
|
|
|
|
@end
|