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-rw-r--r--src/mp4_decode.c52
1 files changed, 40 insertions, 12 deletions
diff --git a/src/mp4_decode.c b/src/mp4_decode.c
index aa6301647..66505a38d 100644
--- a/src/mp4_decode.c
+++ b/src/mp4_decode.c
@@ -88,14 +88,15 @@ int mp4_decode(Buffer * cb, AudioFormat * af, DecoderControl * dc) {
long sampleId;
long numSamples;
int eof = 0;
- int rc;
long dur;
unsigned int sampleCount;
char * sampleBuffer;
size_t sampleBufferLen;
unsigned int initial = 1;
int chunkLen = 0;
-
+ float * seekTable;
+ long seekTableEnd = -1;
+ int seekPositionFound = 0;
fh = fopen(dc->file,"r");
if(!fh) {
@@ -173,19 +174,46 @@ int mp4_decode(Buffer * cb, AudioFormat * af, DecoderControl * dc) {
dc->start = 0;
time = 0.0;
+ seekTable = malloc(sizeof(float)*numSamples);
+
for(sampleId=0; sampleId<numSamples && !eof; sampleId++) {
- if(dc->seek) {
+ if(dc->seek && seekTableEnd>1 &&
+ seekTable[seekTableEnd]>=dc->seekWhere)
+ {
+ int i = 2;
+ while(seekTable[i]<dc->seekWhere) i++;
+ sampleId = i-1;
+ time = seekTable[sampleId];
+ }
+
+ if((dur=mp4ff_get_sample_duration(mp4fh,track,sampleId))==0) {
+ eof = 1;
+ break;
+ }
+
+ if(sampleId>seekTableEnd) {
+ seekTable[sampleId] = time;
+ seekTableEnd = sampleId;
+ }
+
+ if(sampleId==0) dur = 0;
+ time+=((float)dur)/scale;
+
+ if(dc->seek && time>dc->seekWhere) seekPositionFound = 1;
+
+ if(dc->seek && seekPositionFound) {
+ seekPositionFound = 0;
+ chunkLen = 0;
cb->end = 0;
cb->wrap = 0;
-#warning implement seeking here!
dc->seek = 0;
}
- dur = mp4ff_get_sample_duration(mp4fh,track,sampleId);
- rc = mp4ff_read_sample(mp4fh,track,sampleId,&mp4Buffer,
- &mp4BufferSize);
-
- if(rc==0) {
+ if(dc->seek) continue;
+
+ if(mp4ff_read_sample(mp4fh,track,sampleId,&mp4Buffer,
+ &mp4BufferSize) == 0)
+ {
eof = 1;
break;
}
@@ -193,13 +221,12 @@ int mp4_decode(Buffer * cb, AudioFormat * af, DecoderControl * dc) {
sampleBuffer = faacDecDecode(decoder,&frameInfo,mp4Buffer,
mp4BufferSize);
if(mp4Buffer) free(mp4Buffer);
- if(sampleId==0) dur = 0;
- time+=((float)dur)/scale;
sampleCount = (unsigned long)(dur*channels);
if(sampleCount>0) initial =0;
sampleBufferLen = sampleCount*2;
- while(sampleBufferLen > 0) {
+
+ while(sampleBufferLen>0 && !dc->seek) {
size_t size = sampleBufferLen>CHUNK_SIZE-chunkLen ?
CHUNK_SIZE-chunkLen:
sampleBufferLen;
@@ -255,6 +282,7 @@ int mp4_decode(Buffer * cb, AudioFormat * af, DecoderControl * dc) {
}
else dc->state = DECODE_STATE_STOP;
+ free(seekTable);
faacDecClose(decoder);
mp4ff_close(mp4fh);
fclose(fh);