Commit 99f06236 authored by Michael Niedermayer's avatar Michael Niedermayer

pnm parser

Originally committed as revision 3675 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent ae214ac3
......@@ -247,6 +247,7 @@ PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
av_register_codec_parser(&h263_parser);
av_register_codec_parser(&h264_parser);
av_register_codec_parser(&mjpeg_parser);
av_register_codec_parser(&pnm_parser);
av_register_codec_parser(&mpegaudio_parser);
#ifdef CONFIG_AC3
......
......@@ -17,7 +17,7 @@ extern "C" {
#define FFMPEG_VERSION_INT 0x000409
#define FFMPEG_VERSION "0.4.9-pre1"
#define LIBAVCODEC_BUILD 4730
#define LIBAVCODEC_BUILD 4731
#define LIBAVCODEC_VERSION_INT FFMPEG_VERSION_INT
#define LIBAVCODEC_VERSION FFMPEG_VERSION
......@@ -2152,7 +2152,7 @@ typedef struct AVCodecParserContext {
} AVCodecParserContext;
typedef struct AVCodecParser {
int codec_ids[3]; /* several codec IDs are permitted */
int codec_ids[5]; /* several codec IDs are permitted */
int priv_data_size;
int (*parser_init)(AVCodecParserContext *s);
int (*parser_parse)(AVCodecParserContext *s,
......@@ -2180,6 +2180,7 @@ extern AVCodecParser h261_parser;
extern AVCodecParser h263_parser;
extern AVCodecParser h264_parser;
extern AVCodecParser mjpeg_parser;
extern AVCodecParser pnm_parser;
extern AVCodecParser mpegaudio_parser;
extern AVCodecParser ac3_parser;
......
......@@ -38,7 +38,9 @@ AVCodecParserContext *av_parser_init(int codec_id)
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)
parser->codec_ids[2] == codec_id ||
parser->codec_ids[3] == codec_id ||
parser->codec_ids[4] == codec_id)
goto found;
}
return NULL;
......
......@@ -17,6 +17,7 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "avcodec.h"
#include "mpegvideo.h" //only for ParseContext
typedef struct PNMContext {
uint8_t *bytestream;
......@@ -65,25 +66,9 @@ static int common_init(AVCodecContext *avctx){
return 0;
}
static int pnm_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
uint8_t *buf, int buf_size)
{
PNMContext * const s = avctx->priv_data;
AVFrame *picture = data;
AVFrame * const p= (AVFrame*)&s->picture;
int i, n, linesize, h;
static int pnm_decode_header(AVCodecContext *avctx, PNMContext * const s){
char buf1[32];
unsigned char *ptr;
/* special case for last picture */
if (buf_size == 0) {
return 0;
}
s->bytestream_start=
s->bytestream= buf;
s->bytestream_end= buf + buf_size;
int h;
pnm_get(s, buf1, sizeof(buf1));
if (!strcmp(buf1, "P4")) {
......@@ -120,6 +105,30 @@ static int pnm_decode_frame(AVCodecContext *avctx,
h /= 3;
avctx->height = h;
}
return 0;
}
static int pnm_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
uint8_t *buf, int buf_size)
{
PNMContext * const s = avctx->priv_data;
AVFrame *picture = data;
AVFrame * const p= (AVFrame*)&s->picture;
int i, n, linesize, h;
unsigned char *ptr;
/* special case for last picture */
if (buf_size == 0) {
return 0;
}
s->bytestream_start=
s->bytestream= buf;
s->bytestream_end= buf + buf_size;
if(pnm_decode_header(avctx, s) < 0)
return h;
if(p->data[0])
avctx->release_buffer(avctx, p);
......@@ -492,6 +501,75 @@ static int pam_probe(AVProbeData *pd)
}
#endif
static int pnm_parse(AVCodecParserContext *s,
AVCodecContext *avctx,
uint8_t **poutbuf, int *poutbuf_size,
const uint8_t *buf, int buf_size)
{
ParseContext *pc = s->priv_data;
PNMContext pnmctx;
int next;
for(; pc->overread>0; pc->overread--){
pc->buffer[pc->index++]= pc->buffer[pc->overread_index++];
}
retry:
if(pc->index){
pnmctx.bytestream_start=
pnmctx.bytestream= pc->buffer;
pnmctx.bytestream_end= pc->buffer + pc->index;
}else{
pnmctx.bytestream_start=
pnmctx.bytestream= buf;
pnmctx.bytestream_end= buf + buf_size;
}
if(pnm_decode_header(avctx, &pnmctx) < 0){
if(pnmctx.bytestream < pnmctx.bytestream_end){
if(pc->index){
pc->index=0;
}else{
buf++;
buf_size--;
}
goto retry;
}
#if 0
if(pc->index && pc->index*2 + FF_INPUT_BUFFER_PADDING_SIZE < pc->buffer_size && buf_size > pc->index){
memcpy(pc->buffer + pc->index, buf, pc->index);
pc->index += pc->index;
buf += pc->index;
buf_size -= pc->index;
goto retry;
}
#endif
next= END_NOT_FOUND;
}else{
next= pnmctx.bytestream - pnmctx.bytestream_start
+ avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
if(pnmctx.bytestream_start!=buf)
next-= pc->index;
if(next > buf_size)
next= END_NOT_FOUND;
}
if(ff_combine_frame(pc, next, (uint8_t **)&buf, &buf_size)<0){
*poutbuf = NULL;
*poutbuf_size = 0;
return buf_size;
}
*poutbuf = (uint8_t *)buf;
*poutbuf_size = buf_size;
return next;
}
AVCodecParser pnm_parser = {
{ CODEC_ID_PGM, CODEC_ID_PGMYUV, CODEC_ID_PPM, CODEC_ID_PBM},
sizeof(ParseContext),
NULL,
pnm_parse,
ff_parse_close,
};
AVCodec pgm_encoder = {
"pgm",
CODEC_TYPE_VIDEO,
......
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