From 0a5754c3b729cf8fc9b938ac0724ee7261aa1606 Mon Sep 17 00:00:00 2001 From: Bartlomiej Wolowiec Date: Sat, 5 Apr 2008 20:09:36 +0000 Subject: change of aac_ac3_parser, so it is able to send complete portion of data to decoder Originally committed as revision 12758 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/aac_ac3_parser.c | 66 ++++++++++++++++++++++----------------------- libavcodec/aac_ac3_parser.h | 18 ++++++------- libavcodec/aac_parser.c | 10 ++++--- libavcodec/ac3_parser.c | 20 +++++--------- 4 files changed, 53 insertions(+), 61 deletions(-) diff --git a/libavcodec/aac_ac3_parser.c b/libavcodec/aac_ac3_parser.c index 1193647e90..e920b7f88c 100644 --- a/libavcodec/aac_ac3_parser.c +++ b/libavcodec/aac_ac3_parser.c @@ -29,35 +29,32 @@ int ff_aac_ac3_parse(AVCodecParserContext *s1, const uint8_t *buf, int buf_size) { AACAC3ParseContext *s = s1->priv_data; - AACAC3FrameFlag frame_flag; - const uint8_t *buf_ptr; - int len; + ParseContext *pc = &s->pc; + int len, i; - *poutbuf = NULL; - *poutbuf_size = 0; - - 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; + 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; istate = (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; + if(len>0){ + s->remaining_size = len + i; - if(leninbuf_ptr, buf_ptr, len); - buf_ptr += len; - s->inbuf_ptr += len; - buf_size -= len; - } + if(pc->index+i > 0 && s->new_frame_start){ + s->remaining_size -= i; // remaining_size=len +output_frame: + ff_combine_frame(pc, i, &buf, &buf_size); + *poutbuf = buf; + *poutbuf_size = buf_size; - 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) */ @@ -72,17 +69,18 @@ int ff_aac_ac3_parse(AVCodecParserContext *s1, } avctx->bit_rate = s->bit_rate; avctx->frame_size = s->samples; + + return i; } - } - } 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; + }else{ break; } } } - return buf_ptr - buf; + + 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; } diff --git a/libavcodec/aac_ac3_parser.h b/libavcodec/aac_ac3_parser.h index ec9ce48a4a..d5b78f7bc4 100644 --- a/libavcodec/aac_ac3_parser.h +++ b/libavcodec/aac_ac3_parser.h @@ -26,23 +26,23 @@ #include #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)(struct AACAC3ParseContext *hdr_info, AACAC3FrameFlag *flag); - uint8_t inbuf[8192]; /* input buffer */ + int (*sync)(uint64_t state, struct AACAC3ParseContext *hdr_info, + int *need_next_header, int *new_frame_start); 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; } AACAC3ParseContext; int ff_aac_ac3_parse(AVCodecParserContext *s1, diff --git a/libavcodec/aac_parser.c b/libavcodec/aac_parser.c index 2e4334f440..ddf82819be 100644 --- a/libavcodec/aac_parser.c +++ b/libavcodec/aac_parser.c @@ -27,12 +27,14 @@ #define AAC_HEADER_SIZE 7 -static int aac_sync(AACAC3ParseContext *hdr_info, AACAC3FrameFlag *flag) +static int aac_sync(uint64_t state, AACAC3ParseContext *hdr_info, + int *need_next_header, int *new_frame_start) { GetBitContext bits; int size, rdb, ch, sr; + uint64_t tmp = be2me_64(state); - init_get_bits(&bits, hdr_info->inbuf, AAC_HEADER_SIZE * 8); + init_get_bits(&bits, (uint8_t *)&tmp, AAC_HEADER_SIZE * 8); if(get_bits(&bits, 12) != 0xfff) return 0; @@ -65,15 +67,15 @@ static int aac_sync(AACAC3ParseContext *hdr_info, AACAC3FrameFlag *flag) 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 d0a22b9950..57cd87f10d 100644 --- a/libavcodec/ac3_parser.c +++ b/libavcodec/ac3_parser.c @@ -123,12 +123,14 @@ int ff_ac3_parse_header(const uint8_t buf[7], AC3HeaderInfo *hdr) return 0; } -static int ac3_sync(AACAC3ParseContext *hdr_info, AACAC3FrameFlag *flag) +static int ac3_sync(uint64_t state, AACAC3ParseContext *hdr_info, + int *need_next_header, int *new_frame_start) { int err; + uint64_t tmp = be2me_64(state); AC3HeaderInfo hdr; - err = ff_ac3_parse_header(hdr_info->inbuf, &hdr); + err = ff_ac3_parse_header((uint8_t *)&tmp, &hdr); if(err < 0) return 0; @@ -138,24 +140,14 @@ static int ac3_sync(AACAC3ParseContext *hdr_info, AACAC3FrameFlag *flag) hdr_info->channels = hdr.channels; hdr_info->samples = AC3_FRAME_SIZE; - 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; - } + *need_next_header = (hdr.frame_type != EAC3_FRAME_TYPE_AC3_CONVERT); + *new_frame_start = (hdr.frame_type != EAC3_FRAME_TYPE_DEPENDENT); 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; -- cgit v1.2.3