/*
* Audio and Video frame extraction
- * Copyright (c) 2003 Fabrice Bellard.
- * Copyright (c) 2003 Michael Niedermayer.
+ * Copyright (c) 2003 Fabrice Bellard
+ * Copyright (c) 2003 Michael Niedermayer
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include "avcodec.h"
-#include "mpegvideo.h"
-#include "mpegaudio.h"
+
+#include <stdint.h>
+#include <string.h>
+
+#include "libavutil/mem.h"
+
+#include "internal.h"
#include "parser.h"
-AVCodecParser *av_first_parser = NULL;
+static AVCodecParser *av_first_parser = NULL;
+
+AVCodecParser *av_parser_next(const AVCodecParser *p)
+{
+ if (p)
+ return p->next;
+ else
+ return av_first_parser;
+}
void av_register_codec_parser(AVCodecParser *parser)
{
AVCodecParser *parser;
int ret;
- if(codec_id == CODEC_ID_NONE)
+ if (codec_id == AV_CODEC_ID_NONE)
return NULL;
- for(parser = av_first_parser; parser != NULL; parser = parser->next) {
+ for (parser = av_first_parser; parser != NULL; parser = parser->next) {
if (parser->codec_ids[0] == codec_id ||
parser->codec_ids[1] == codec_id ||
parser->codec_ids[2] == codec_id ||
goto found;
}
return NULL;
- found:
+
+found:
s = av_mallocz(sizeof(AVCodecParserContext));
if (!s)
return NULL;
s->parser = parser;
- s->priv_data = av_mallocz(parser->priv_data_size);
- if (!s->priv_data) {
- av_free(s);
- return NULL;
+ if (parser->priv_data_size) {
+ s->priv_data = av_mallocz(parser->priv_data_size);
+ if (!s->priv_data) {
+ av_free(s);
+ return NULL;
+ }
}
if (parser->parser_init) {
ret = parser->parser_init(s);
return NULL;
}
}
- s->fetch_timestamp=1;
- s->pict_type = FF_I_TYPE;
+ s->fetch_timestamp = 1;
+ s->pict_type = AV_PICTURE_TYPE_I;
+ s->key_frame = -1;
+ s->convergence_duration = 0;
+ s->dts_sync_point = INT_MIN;
+ s->dts_ref_dts_delta = INT_MIN;
+ s->pts_dts_delta = INT_MIN;
+ s->format = -1;
+
return s;
}
-/**
- *
- * @param buf input
- * @param buf_size input length, to signal EOF, this should be 0 (so that the last frame can be output)
- * @param pts input presentation timestamp
- * @param dts input decoding timestamp
- * @param poutbuf will contain a pointer to the first byte of the output frame
- * @param poutbuf_size will contain the length of the output frame
- * @return the number of bytes of the input bitstream used
- *
- * Example:
- * @code
- * while(in_len){
- * len = av_parser_parse(myparser, AVCodecContext, &data, &size,
- * in_data, in_len,
- * pts, dts);
- * in_data += len;
- * in_len -= len;
- *
- * if(size)
- * decode_frame(data, size);
- * }
- * @endcode
- */
-int av_parser_parse(AVCodecParserContext *s,
- AVCodecContext *avctx,
- uint8_t **poutbuf, int *poutbuf_size,
- const uint8_t *buf, int buf_size,
- int64_t pts, int64_t dts)
+void ff_fetch_timestamp(AVCodecParserContext *s, int off, int remove)
{
- int index, i, k;
+ int i;
+
+ s->dts =
+ s->pts = AV_NOPTS_VALUE;
+ s->pos = -1;
+ s->offset = 0;
+ for (i = 0; i < AV_PARSER_PTS_NB; i++) {
+ if (s->cur_offset + off >= s->cur_frame_offset[i] &&
+ (s->frame_offset < s->cur_frame_offset[i] ||
+ (!s->frame_offset && !s->next_frame_offset)) &&
+ s->cur_frame_end[i]) {
+ s->dts = s->cur_frame_dts[i];
+ s->pts = s->cur_frame_pts[i];
+ s->pos = s->cur_frame_pos[i];
+ s->offset = s->next_frame_offset - s->cur_frame_offset[i];
+ if (remove)
+ s->cur_frame_offset[i] = INT64_MAX;
+ if (s->cur_offset + off < s->cur_frame_end[i])
+ break;
+ }
+ }
+}
+
+int av_parser_parse2(AVCodecParserContext *s, AVCodecContext *avctx,
+ uint8_t **poutbuf, int *poutbuf_size,
+ const uint8_t *buf, int buf_size,
+ int64_t pts, int64_t dts, int64_t pos)
+{
+ int index, i;
uint8_t dummy_buf[FF_INPUT_BUFFER_PADDING_SIZE];
+ if (!(s->flags & PARSER_FLAG_FETCHED_OFFSET)) {
+ s->next_frame_offset =
+ s->cur_offset = pos;
+ s->flags |= PARSER_FLAG_FETCHED_OFFSET;
+ }
+
if (buf_size == 0) {
/* padding is always necessary even if EOF, so we add it here */
memset(dummy_buf, 0, sizeof(dummy_buf));
buf = dummy_buf;
- } else {
+ } else if (s->cur_offset + buf_size != s->cur_frame_end[s->cur_frame_start_index]) { /* skip remainder packets */
/* add a new packet descriptor */
- k = (s->cur_frame_start_index + 1) & (AV_PARSER_PTS_NB - 1);
- s->cur_frame_start_index = k;
- s->cur_frame_offset[k] = s->cur_offset;
- s->cur_frame_pts[k] = pts;
- s->cur_frame_dts[k] = dts;
-
- /* fill first PTS/DTS */
- if (s->fetch_timestamp){
- s->fetch_timestamp=0;
- s->last_pts = pts;
- s->last_dts = dts;
- s->last_offset = 0;
- s->cur_frame_pts[k] =
- s->cur_frame_dts[k] = AV_NOPTS_VALUE;
- }
+ i = (s->cur_frame_start_index + 1) & (AV_PARSER_PTS_NB - 1);
+ s->cur_frame_start_index = i;
+ s->cur_frame_offset[i] = s->cur_offset;
+ s->cur_frame_end[i] = s->cur_offset + buf_size;
+ s->cur_frame_pts[i] = pts;
+ s->cur_frame_dts[i] = dts;
+ s->cur_frame_pos[i] = pos;
}
+ if (s->fetch_timestamp) {
+ s->fetch_timestamp = 0;
+ s->last_pts = s->pts;
+ s->last_dts = s->dts;
+ s->last_pos = s->pos;
+ ff_fetch_timestamp(s, 0, 0);
+ }
/* WARNING: the returned index can be negative */
- index = s->parser->parser_parse(s, avctx, (const uint8_t **)poutbuf, poutbuf_size, buf, buf_size);
-//av_log(NULL, AV_LOG_DEBUG, "parser: in:%"PRId64", %"PRId64", out:%"PRId64", %"PRId64", in:%d out:%d id:%d\n", pts, dts, s->last_pts, s->last_dts, buf_size, *poutbuf_size, avctx->codec_id);
+ index = s->parser->parser_parse(s, avctx, (const uint8_t **) poutbuf,
+ poutbuf_size, buf, buf_size);
/* update the file pointer */
if (*poutbuf_size) {
/* fill the data for the current frame */
- s->frame_offset = s->last_frame_offset;
- s->pts = s->last_pts;
- s->dts = s->last_dts;
- s->offset = s->last_offset;
+ s->frame_offset = s->next_frame_offset;
/* offset of the next frame */
- s->last_frame_offset = s->cur_offset + index;
- /* find the packet in which the new frame starts. It
- is tricky because of MPEG video start codes
- which can begin in one packet and finish in
- another packet. In the worst case, an MPEG
- video start code could be in 4 different
- packets. */
- k = s->cur_frame_start_index;
- for(i = 0; i < AV_PARSER_PTS_NB; i++) {
- if (s->last_frame_offset >= s->cur_frame_offset[k])
- break;
- k = (k - 1) & (AV_PARSER_PTS_NB - 1);
- }
-
- s->last_pts = s->cur_frame_pts[k];
- s->last_dts = s->cur_frame_dts[k];
- s->last_offset = s->last_frame_offset - s->cur_frame_offset[k];
-
- /* some parsers tell us the packet size even before seeing the first byte of the next packet,
- so the next pts/dts is in the next chunk */
- if(index == buf_size){
- s->fetch_timestamp=1;
- }
+ s->next_frame_offset = s->cur_offset + index;
+ s->fetch_timestamp = 1;
}
if (index < 0)
index = 0;
return index;
}
-/**
- *
- * @return 0 if the output buffer is a subset of the input, 1 if it is allocated and must be freed
- * @deprecated use AVBitstreamFilter
- */
-int av_parser_change(AVCodecParserContext *s,
- AVCodecContext *avctx,
+int av_parser_change(AVCodecParserContext *s, AVCodecContext *avctx,
uint8_t **poutbuf, int *poutbuf_size,
- const uint8_t *buf, int buf_size, int keyframe){
-
- if(s && s->parser->split){
- if((avctx->flags & CODEC_FLAG_GLOBAL_HEADER) || (avctx->flags2 & CODEC_FLAG2_LOCAL_HEADER)){
- int i= s->parser->split(avctx, buf, buf_size);
- buf += i;
+ const uint8_t *buf, int buf_size, int keyframe)
+{
+ if (s && s->parser->split) {
+ if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER ||
+ avctx->flags2 & CODEC_FLAG2_LOCAL_HEADER) {
+ int i = s->parser->split(avctx, buf, buf_size);
+ buf += i;
buf_size -= i;
}
}
/* cast to avoid warning about discarding qualifiers */
- *poutbuf= (uint8_t *) buf;
- *poutbuf_size= buf_size;
- if(avctx->extradata){
- if( (keyframe && (avctx->flags2 & CODEC_FLAG2_LOCAL_HEADER))
- /*||(s->pict_type != I_TYPE && (s->flags & PARSER_FLAG_DUMP_EXTRADATA_AT_NOKEY))*/
- /*||(? && (s->flags & PARSER_FLAG_DUMP_EXTRADATA_AT_BEGIN)*/){
- int size= buf_size + avctx->extradata_size;
- *poutbuf_size= size;
- *poutbuf= av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
+ *poutbuf = (uint8_t *) buf;
+ *poutbuf_size = buf_size;
+ if (avctx->extradata) {
+ if (keyframe && (avctx->flags2 & CODEC_FLAG2_LOCAL_HEADER)) {
+ int size = buf_size + avctx->extradata_size;
+
+ *poutbuf_size = size;
+ *poutbuf = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
+ if (!*poutbuf)
+ return AVERROR(ENOMEM);
memcpy(*poutbuf, avctx->extradata, avctx->extradata_size);
- memcpy((*poutbuf) + avctx->extradata_size, buf, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
+ memcpy(*poutbuf + avctx->extradata_size, buf,
+ buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
return 1;
}
}
void av_parser_close(AVCodecParserContext *s)
{
- if (s->parser->parser_close)
- s->parser->parser_close(s);
- av_free(s->priv_data);
- av_free(s);
+ if (s) {
+ if (s->parser->parser_close)
+ s->parser->parser_close(s);
+ av_free(s->priv_data);
+ av_free(s);
+ }
}
-/*****************************************************/
-
-/**
- * combines the (truncated) bitstream to a complete frame
- * @returns -1 if no complete frame could be created
- */
-int ff_combine_frame(ParseContext *pc, int next, const uint8_t **buf, int *buf_size)
+int ff_combine_frame(ParseContext *pc, int next,
+ const uint8_t **buf, int *buf_size)
{
-#if 0
- if(pc->overread){
- printf("overread %d, state:%X next:%d index:%d o_index:%d\n", pc->overread, pc->state, next, pc->index, pc->overread_index);
- printf("%X %X %X %X\n", (*buf)[0], (*buf)[1],(*buf)[2],(*buf)[3]);
+ if (pc->overread) {
+ ff_dlog(NULL, "overread %d, state:%X next:%d index:%d o_index:%d\n",
+ pc->overread, pc->state, next, pc->index, pc->overread_index);
+ ff_dlog(NULL, "%X %X %X %X\n",
+ (*buf)[0], (*buf)[1], (*buf)[2], (*buf)[3]);
}
-#endif
/* Copy overread bytes from last frame into buffer. */
- for(; pc->overread>0; pc->overread--){
- pc->buffer[pc->index++]= pc->buffer[pc->overread_index++];
- }
+ for (; pc->overread > 0; pc->overread--)
+ pc->buffer[pc->index++] = pc->buffer[pc->overread_index++];
/* flush remaining if EOF */
- if(!*buf_size && next == END_NOT_FOUND){
- next= 0;
- }
+ if (!*buf_size && next == END_NOT_FOUND)
+ next = 0;
- pc->last_index= pc->index;
+ pc->last_index = pc->index;
/* copy into buffer end return */
- if(next == END_NOT_FOUND){
- pc->buffer= av_fast_realloc(pc->buffer, &pc->buffer_size, (*buf_size) + pc->index + FF_INPUT_BUFFER_PADDING_SIZE);
-
+ if (next == END_NOT_FOUND) {
+ void *new_buffer = av_fast_realloc(pc->buffer, &pc->buffer_size,
+ *buf_size + pc->index +
+ FF_INPUT_BUFFER_PADDING_SIZE);
+
+ if (!new_buffer)
+ return AVERROR(ENOMEM);
+ pc->buffer = new_buffer;
memcpy(&pc->buffer[pc->index], *buf, *buf_size);
pc->index += *buf_size;
return -1;
}
- *buf_size=
- pc->overread_index= pc->index + next;
+ *buf_size =
+ pc->overread_index = pc->index + next;
/* append to buffer */
- if(pc->index){
- pc->buffer= av_fast_realloc(pc->buffer, &pc->buffer_size, next + pc->index + FF_INPUT_BUFFER_PADDING_SIZE);
-
- memcpy(&pc->buffer[pc->index], *buf, next + FF_INPUT_BUFFER_PADDING_SIZE );
+ if (pc->index) {
+ void *new_buffer = av_fast_realloc(pc->buffer, &pc->buffer_size,
+ next + pc->index +
+ FF_INPUT_BUFFER_PADDING_SIZE);
+
+ if (!new_buffer)
+ return AVERROR(ENOMEM);
+ pc->buffer = new_buffer;
+ if (next > -FF_INPUT_BUFFER_PADDING_SIZE)
+ memcpy(&pc->buffer[pc->index], *buf,
+ next + FF_INPUT_BUFFER_PADDING_SIZE);
pc->index = 0;
- *buf= pc->buffer;
+ *buf = pc->buffer;
}
/* store overread bytes */
- for(;next < 0; next++){
- pc->state = (pc->state<<8) | pc->buffer[pc->last_index + next];
+ for (; next < 0; next++) {
+ pc->state = pc->state << 8 | pc->buffer[pc->last_index + next];
+ pc->state64 = pc->state64 << 8 | pc->buffer[pc->last_index + next];
pc->overread++;
}
-#if 0
- if(pc->overread){
- printf("overread %d, state:%X next:%d index:%d o_index:%d\n", pc->overread, pc->state, next, pc->index, pc->overread_index);
- printf("%X %X %X %X\n", (*buf)[0], (*buf)[1],(*buf)[2],(*buf)[3]);
+ if (pc->overread) {
+ ff_dlog(NULL, "overread %d, state:%X next:%d index:%d o_index:%d\n",
+ pc->overread, pc->state, next, pc->index, pc->overread_index);
+ ff_dlog(NULL, "%X %X %X %X\n",
+ (*buf)[0], (*buf)[1], (*buf)[2], (*buf)[3]);
}
-#endif
return 0;
}
{
ParseContext *pc = s->priv_data;
- av_free(pc->buffer);
-}
-
-void ff_parse1_close(AVCodecParserContext *s)
-{
- ParseContext1 *pc1 = s->priv_data;
-
- av_free(pc1->pc.buffer);
- av_free(pc1->enc);
+ av_freep(&pc->buffer);
}
-/*************************/
-
-int ff_mpeg4video_split(AVCodecContext *avctx,
- const uint8_t *buf, int buf_size)
+int ff_mpeg4video_split(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
{
int i;
- uint32_t state= -1;
+ uint32_t state = -1;
- for(i=0; i<buf_size; i++){
- state= (state<<8) | buf[i];
- if(state == 0x1B3 || state == 0x1B6)
- return i-3;
+ for (i = 0; i < buf_size; i++) {
+ state = state << 8 | buf[i];
+ if (state == 0x1B3 || state == 0x1B6)
+ return i - 3;
}
return 0;
}
projects / ffmpeg / blobdiff