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authorBartlomiej Wolowiec <bartek.wolowiec@gmail.com>2008-04-09 22:11:21 +0000
committerBartlomiej Wolowiec <bartek.wolowiec@gmail.com>2008-04-09 22:11:21 +0000
commit469d8816d6e1a2eaee3f590c1125ed9586da3014 (patch)
treee7fb48b80b8220e355fd37c054c89e13d7e137f4 /libavcodec
parent76ca42a8a010acf7939f5635282279c90a313d78 (diff)
downloadffmpeg-469d8816d6e1a2eaee3f590c1125ed9586da3014.tar.gz
undo changes in aac_ac3_parser
Originally committed as revision 12778 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec')
-rw-r--r--libavcodec/aac_ac3_parser.c73
-rw-r--r--libavcodec/aac_ac3_parser.h19
-rw-r--r--libavcodec/aac_parser.c10
-rw-r--r--libavcodec/ac3_parser.c20
4 files changed, 61 insertions, 61 deletions
diff --git a/libavcodec/aac_ac3_parser.c b/libavcodec/aac_ac3_parser.c
index e6e2b21c9c..1193647e90 100644
--- a/libavcodec/aac_ac3_parser.c
+++ b/libavcodec/aac_ac3_parser.c
@@ -29,38 +29,35 @@ int ff_aac_ac3_parse(AVCodecParserContext *s1,
const uint8_t *buf, int buf_size)
{
AACAC3ParseContext *s = s1->priv_data;
- ParseContext *pc = &s->pc;
- int len, i;
+ AACAC3FrameFlag frame_flag;
+ const uint8_t *buf_ptr;
+ int len;
- while(s->remaining_size <= buf_size){
- if(s->remaining_size && !s->need_next_header){
- i= s->remaining_size;
- s->remaining_size = 0;
- goto output_frame;
- }else{ //we need a header first
- len=0;
- for(i=s->remaining_size; i<buf_size; i++){
- s->state = (s->state<<8) + buf[i];
- if((len=s->sync(s->state, s, &s->need_next_header, &s->new_frame_start)))
- break;
- }
- i-= s->header_size -1;
- if(len>0){
- s->remaining_size = len + i;
+ *poutbuf = NULL;
+ *poutbuf_size = 0;
- if(pc->index+i > 0 && s->new_frame_start){
- s->remaining_size -= i; // remaining_size=len
-output_frame:
- if(!s->frame_in_buffer){
- s->frame_in_buffer=1;
- buf+=i;
- buf_size-=i;
- continue;
- }
- ff_combine_frame(pc, i, &buf, &buf_size);
- *poutbuf = buf;
- *poutbuf_size = buf_size;
+ buf_ptr = buf;
+ while (buf_size > 0) {
+ int size_needed= s->frame_size ? s->frame_size : s->header_size;
+ len = s->inbuf_ptr - s->inbuf;
+
+ if(len<size_needed){
+ len = FFMIN(size_needed - len, buf_size);
+ memcpy(s->inbuf_ptr, buf_ptr, len);
+ buf_ptr += len;
+ s->inbuf_ptr += len;
+ buf_size -= len;
+ }
+ if (s->frame_size == 0) {
+ if ((s->inbuf_ptr - s->inbuf) == s->header_size) {
+ len = s->sync(s, &frame_flag);
+ if (len == 0) {
+ /* no sync found : move by one byte (inefficient, but simple!) */
+ memmove(s->inbuf, s->inbuf + 1, s->header_size - 1);
+ s->inbuf_ptr--;
+ } else {
+ s->frame_size = len;
/* update codec info */
avctx->sample_rate = s->sample_rate;
/* allow downmixing to stereo (or mono for AC3) */
@@ -75,19 +72,17 @@ output_frame:
}
avctx->bit_rate = s->bit_rate;
avctx->frame_size = s->samples;
-
- return i;
}
- s->frame_in_buffer=1;
- }else{
+ }
+ } else {
+ if(s->inbuf_ptr - s->inbuf == s->frame_size){
+ *poutbuf = s->inbuf;
+ *poutbuf_size = s->frame_size;
+ s->inbuf_ptr = s->inbuf;
+ s->frame_size = 0;
break;
}
}
}
-
- ff_combine_frame(pc, END_NOT_FOUND, &buf, &buf_size);
- s->remaining_size -= FFMIN(s->remaining_size, buf_size);
- *poutbuf = NULL;
- *poutbuf_size = 0;
- return buf_size;
+ return buf_ptr - buf;
}
diff --git a/libavcodec/aac_ac3_parser.h b/libavcodec/aac_ac3_parser.h
index 2049dc7097..ec9ce48a4a 100644
--- a/libavcodec/aac_ac3_parser.h
+++ b/libavcodec/aac_ac3_parser.h
@@ -26,24 +26,23 @@
#include <stdint.h>
#include "avcodec.h"
+typedef enum{
+ FRAME_COMPLETE, ///< Complete frame, ends previous frame
+ FRAME_START, ///< Frame start, ends previous frame
+ FRAME_CONTINUATION ///< Part of the previous frame
+}AACAC3FrameFlag;
+
typedef struct AACAC3ParseContext {
+ uint8_t *inbuf_ptr;
int frame_size;
int header_size;
- int (*sync)(uint64_t state, struct AACAC3ParseContext *hdr_info,
- int *need_next_header, int *new_frame_start);
+ int (*sync)(struct AACAC3ParseContext *hdr_info, AACAC3FrameFlag *flag);
+ uint8_t inbuf[8192]; /* input buffer */
int channels;
int sample_rate;
int bit_rate;
int samples;
-
- ParseContext pc;
- int remaining_size;
- uint64_t state;
-
- int need_next_header;
- int new_frame_start;
- int frame_in_buffer;
} AACAC3ParseContext;
int ff_aac_ac3_parse(AVCodecParserContext *s1,
diff --git a/libavcodec/aac_parser.c b/libavcodec/aac_parser.c
index 9fbef864a1..2e4334f440 100644
--- a/libavcodec/aac_parser.c
+++ b/libavcodec/aac_parser.c
@@ -27,14 +27,12 @@
#define AAC_HEADER_SIZE 7
-static int aac_sync(uint64_t state, AACAC3ParseContext *hdr_info,
- int *need_next_header, int *new_frame_start)
+static int aac_sync(AACAC3ParseContext *hdr_info, AACAC3FrameFlag *flag)
{
GetBitContext bits;
int size, rdb, ch, sr;
- uint64_t tmp = be2me_64(state);
- init_get_bits(&bits, ((uint8_t *)&tmp)+8-AAC_HEADER_SIZE, AAC_HEADER_SIZE * 8);
+ init_get_bits(&bits, hdr_info->inbuf, AAC_HEADER_SIZE * 8);
if(get_bits(&bits, 12) != 0xfff)
return 0;
@@ -67,15 +65,15 @@ static int aac_sync(uint64_t state, AACAC3ParseContext *hdr_info,
hdr_info->sample_rate = ff_mpeg4audio_sample_rates[sr];
hdr_info->samples = (rdb + 1) * 1024;
hdr_info->bit_rate = size * 8 * hdr_info->sample_rate / hdr_info->samples;
+ *flag = FRAME_COMPLETE;
- *need_next_header=0;
- *new_frame_start=1;
return size;
}
static av_cold int aac_parse_init(AVCodecParserContext *s1)
{
AACAC3ParseContext *s = s1->priv_data;
+ s->inbuf_ptr = s->inbuf;
s->header_size = AAC_HEADER_SIZE;
s->sync = aac_sync;
return 0;
diff --git a/libavcodec/ac3_parser.c b/libavcodec/ac3_parser.c
index a1d57e4c6e..d0a22b9950 100644
--- a/libavcodec/ac3_parser.c
+++ b/libavcodec/ac3_parser.c
@@ -123,14 +123,12 @@ int ff_ac3_parse_header(const uint8_t buf[7], AC3HeaderInfo *hdr)
return 0;
}
-static int ac3_sync(uint64_t state, AACAC3ParseContext *hdr_info,
- int *need_next_header, int *new_frame_start)
+static int ac3_sync(AACAC3ParseContext *hdr_info, AACAC3FrameFlag *flag)
{
int err;
- uint64_t tmp = be2me_64(state);
AC3HeaderInfo hdr;
- err = ff_ac3_parse_header(((uint8_t *)&tmp)+8-AC3_HEADER_SIZE, &hdr);
+ err = ff_ac3_parse_header(hdr_info->inbuf, &hdr);
if(err < 0)
return 0;
@@ -140,14 +138,24 @@ static int ac3_sync(uint64_t state, AACAC3ParseContext *hdr_info,
hdr_info->channels = hdr.channels;
hdr_info->samples = AC3_FRAME_SIZE;
- *need_next_header = (hdr.frame_type != EAC3_FRAME_TYPE_AC3_CONVERT);
- *new_frame_start = (hdr.frame_type != EAC3_FRAME_TYPE_DEPENDENT);
+ switch(hdr.frame_type){
+ case EAC3_FRAME_TYPE_INDEPENDENT:
+ *flag = FRAME_START;
+ break;
+ case EAC3_FRAME_TYPE_DEPENDENT:
+ *flag = FRAME_CONTINUATION;
+ break;
+ case EAC3_FRAME_TYPE_AC3_CONVERT:
+ *flag = FRAME_COMPLETE;
+ break;
+ }
return hdr.frame_size;
}
static av_cold int ac3_parse_init(AVCodecParserContext *s1)
{
AACAC3ParseContext *s = s1->priv_data;
+ s->inbuf_ptr = s->inbuf;
s->header_size = AC3_HEADER_SIZE;
s->sync = ac3_sync;
return 0;