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authorFabrice Bellard <fabrice@bellard.org>2002-11-25 19:07:40 +0000
committerFabrice Bellard <fabrice@bellard.org>2002-11-25 19:07:40 +0000
commitabac6175916c57f59ddb51ffe41bfd1d9851fe38 (patch)
tree8fc5b70a143f0f74468c353afbf043d7e104cdc0 /libav/avidec.c
parent57fc25764261abe71b6cf7571eca182f8acf5795 (diff)
renamed libav to libavformat
Originally committed as revision 1276 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libav/avidec.c')
-rw-r--r--libav/avidec.c256
1 files changed, 0 insertions, 256 deletions
diff --git a/libav/avidec.c b/libav/avidec.c
deleted file mode 100644
index 9646408cd1..0000000000
--- a/libav/avidec.c
+++ /dev/null
@@ -1,256 +0,0 @@
-/*
- * AVI decoder.
- * Copyright (c) 2001 Fabrice Bellard.
- *
- * This library 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 of the License, or (at your option) any later version.
- *
- * This library 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-#include "avformat.h"
-#include "avi.h"
-
-//#define DEBUG
-
-typedef struct AVIIndex {
- unsigned char tag[4];
- unsigned int flags, pos, len;
- struct AVIIndex *next;
-} AVIIndex;
-
-typedef struct {
- INT64 movi_end;
- offset_t movi_list;
- AVIIndex *first, *last;
-} AVIContext;
-
-#ifdef DEBUG
-static void print_tag(const char *str, unsigned int tag, int size)
-{
- printf("%s: tag=%c%c%c%c size=0x%x\n",
- str, tag & 0xff,
- (tag >> 8) & 0xff,
- (tag >> 16) & 0xff,
- (tag >> 24) & 0xff,
- size);
-}
-#endif
-
-static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
-{
- AVIContext *avi = s->priv_data;
- ByteIOContext *pb = &s->pb;
- UINT32 tag, tag1;
- int codec_type, stream_index, size, frame_period, bit_rate;
- int i;
- AVStream *st;
-
- /* check RIFF header */
- tag = get_le32(pb);
-
- if (tag != MKTAG('R', 'I', 'F', 'F'))
- return -1;
- get_le32(pb); /* file size */
- tag = get_le32(pb);
- if (tag != MKTAG('A', 'V', 'I', ' '))
- return -1;
-
- /* first list tag */
- stream_index = -1;
- codec_type = -1;
- frame_period = 0;
- for(;;) {
- if (url_feof(pb))
- goto fail;
- tag = get_le32(pb);
- size = get_le32(pb);
-#ifdef DEBUG
- print_tag("tag", tag, size);
-#endif
-
- switch(tag) {
- case MKTAG('L', 'I', 'S', 'T'):
- /* ignored, except when start of video packets */
- tag1 = get_le32(pb);
-#ifdef DEBUG
- print_tag("list", tag1, 0);
-#endif
- if (tag1 == MKTAG('m', 'o', 'v', 'i')) {
- avi->movi_end = url_ftell(pb) + size - 4;
-#ifdef DEBUG
- printf("movi end=%Lx\n", avi->movi_end);
-#endif
- goto end_of_header;
- }
- break;
- case MKTAG('a', 'v', 'i', 'h'):
- /* avi header */
- /* using frame_period is bad idea */
- frame_period = get_le32(pb);
- bit_rate = get_le32(pb) * 8;
- url_fskip(pb, 4 * 4);
- s->nb_streams = get_le32(pb);
- for(i=0;i<s->nb_streams;i++) {
- AVStream *st = av_mallocz(sizeof(AVStream));
- if (!st)
- goto fail;
- s->streams[i] = st;
- }
- url_fskip(pb, size - 7 * 4);
- break;
- case MKTAG('s', 't', 'r', 'h'):
- /* stream header */
- stream_index++;
- tag1 = get_le32(pb);
- switch(tag1) {
- case MKTAG('v', 'i', 'd', 's'):
- codec_type = CODEC_TYPE_VIDEO;
- get_le32(pb); /* codec tag */
- get_le32(pb); /* flags */
- get_le16(pb); /* priority */
- get_le16(pb); /* language */
- get_le32(pb); /* XXX: initial frame ? */
- get_le32(pb); /* scale */
- get_le32(pb); /* rate */
- size -= 6 * 4;
- break;
- case MKTAG('a', 'u', 'd', 's'):
- codec_type = CODEC_TYPE_AUDIO;
- /* nothing really useful */
- }
- url_fskip(pb, size - 4);
- break;
- case MKTAG('s', 't', 'r', 'f'):
- /* stream header */
- if (stream_index >= s->nb_streams) {
- url_fskip(pb, size);
- } else {
- st = s->streams[stream_index];
- switch(codec_type) {
- case CODEC_TYPE_VIDEO:
- get_le32(pb); /* size */
- st->codec.width = get_le32(pb);
- st->codec.height = get_le32(pb);
- if (frame_period)
- st->codec.frame_rate = (INT64_C(1000000) * FRAME_RATE_BASE) / frame_period;
- else
- st->codec.frame_rate = 25 * FRAME_RATE_BASE;
- get_le16(pb); /* panes */
- get_le16(pb); /* depth */
- tag1 = get_le32(pb);
-#ifdef DEBUG
- print_tag("video", tag1, 0);
-#endif
- st->codec.codec_type = CODEC_TYPE_VIDEO;
- st->codec.codec_tag = tag1;
- st->codec.codec_id = codec_get_id(codec_bmp_tags, tag1);
- url_fskip(pb, size - 5 * 4);
- break;
- case CODEC_TYPE_AUDIO:
- get_wav_header(pb, &st->codec, (size >= 18));
- break;
- default:
- url_fskip(pb, size);
- break;
- }
- }
- break;
- default:
- /* skip tag */
- size += (size & 1);
- url_fskip(pb, size);
- break;
- }
- }
- end_of_header:
- /* check stream number */
- if (stream_index != s->nb_streams - 1) {
- fail:
- for(i=0;i<s->nb_streams;i++) {
- av_freep(&s->streams[i]);
- }
- return -1;
- }
-
- return 0;
-}
-
-static int avi_read_packet(AVFormatContext *s, AVPacket *pkt)
-{
- AVIContext *avi = s->priv_data;
- ByteIOContext *pb = &s->pb;
- int n, d1, d2, size;
-
- for(;;) {
- if (url_feof(pb) || url_ftell(pb) >= avi->movi_end)
- return -1;
- d1 = get_byte(pb) - '0';
- d2 = get_byte(pb) - '0';
- if (d1 < 0 || d1 > 9 || d2 < 0 || d2 > 9)
- continue;
-
- n = d1 * 10 + d2;
- if (n < 0 || n >= s->nb_streams)
- continue;
-
- d1 = get_byte(pb);
- d2 = get_byte(pb);
- if ((d1 == 'd' && d2 == 'c')
- || (d1 == 'w' && d2 == 'b'))
- break;
- }
- size = get_le32(pb);
- av_new_packet(pkt, size);
- pkt->stream_index = n;
-
- get_buffer(pb, pkt->data, pkt->size);
-
- if (size & 1)
- get_byte(pb);
-
- return 0;
-}
-
-static int avi_read_close(AVFormatContext *s)
-{
- return 0;
-}
-
-static int avi_probe(AVProbeData *p)
-{
- /* check file header */
- if (p->buf_size <= 32)
- return 0;
- if (p->buf[0] == 'R' && p->buf[1] == 'I' &&
- p->buf[2] == 'F' && p->buf[3] == 'F' &&
- p->buf[8] == 'A' && p->buf[9] == 'V' &&
- p->buf[10] == 'I' && p->buf[11] == ' ')
- return AVPROBE_SCORE_MAX;
- else
- return 0;
-}
-
-static AVInputFormat avi_iformat = {
- "avi",
- "avi format",
- sizeof(AVIContext),
- avi_probe,
- avi_read_header,
- avi_read_packet,
- avi_read_close,
-};
-
-int avidec_init(void)
-{
- av_register_input_format(&avi_iformat);
- return 0;
-}