* IFF (.iff) file demuxer
* Copyright (c) 2008 Jaikrishnan Menon <realityman@gmx.net>
* Copyright (c) 2010 Peter Ross <pross@xvid.org>
+ * Copyright (c) 2010 Sebastian Vater <cdgs.basty@googlemail.com>
*
- * 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
*/
/**
- * @file libavformat/iff.c
+ * @file
* IFF file demuxer
* by Jaikrishnan Menon
* for more information on the .iff file format, visit:
*/
#include "libavutil/intreadwrite.h"
-#include "libavcodec/iff.h"
#include "avformat.h"
#define ID_8SVX MKTAG('8','S','V','X')
#define PACKET_SIZE 1024
-typedef enum {COMP_NONE, COMP_FIB, COMP_EXP} svx8_compression_type;
-typedef enum {BITMAP_RAW, BITMAP_BYTERUN1} bitmap_compression_type;
+typedef enum {
+ COMP_NONE,
+ COMP_FIB,
+ COMP_EXP
+} svx8_compression_type;
+
+typedef enum {
+ BITMAP_RAW,
+ BITMAP_BYTERUN1
+} bitmap_compression_type;
typedef struct {
+ uint64_t body_pos;
uint32_t body_size;
uint32_t sent_bytes;
uint32_t audio_frame_count;
}
}
+/* Metadata string read */
+static int get_metadata(AVFormatContext *s,
+ const char *const tag,
+ const unsigned data_size)
+{
+ uint8_t *buf = ((data_size + 1) == 0) ? NULL : av_malloc(data_size + 1);
+
+ if (!buf)
+ return AVERROR(ENOMEM);
+
+ if (avio_read(s->pb, buf, data_size) < 0) {
+ av_free(buf);
+ return AVERROR(EIO);
+ }
+ buf[data_size] = 0;
+ av_metadata_set2(&s->metadata, tag, buf, AV_METADATA_DONT_STRDUP_VAL);
+ return 0;
+}
+
static int iff_probe(AVProbeData *p)
{
const uint8_t *d = p->buf;
AVFormatParameters *ap)
{
IffDemuxContext *iff = s->priv_data;
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
AVStream *st;
uint32_t chunk_id, data_size;
- int padding, done = 0;
int compression = -1;
- char *buf;
st = av_new_stream(s, 0);
if (!st)
- return AVERROR(ENOMEM);
+ return AVERROR(ENOMEM);
st->codec->channels = 1;
- url_fskip(pb, 8);
+ avio_skip(pb, 8);
// codec_tag used by ByteRun1 decoder to distinguish progressive (PBM) and interlaced (ILBM) content
- st->codec->codec_tag = get_le32(pb);
+ st->codec->codec_tag = avio_rl32(pb);
- while(!done && !url_feof(pb)) {
- chunk_id = get_le32(pb);
- data_size = get_be32(pb);
- padding = data_size & 1;
+ while(!pb->eof_reached) {
+ uint64_t orig_pos;
+ int res;
+ const char *metadata_tag = NULL;
+ chunk_id = avio_rl32(pb);
+ data_size = avio_rb32(pb);
+ orig_pos = avio_tell(pb);
switch(chunk_id) {
case ID_VHDR:
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
- url_fskip(pb, 12);
- st->codec->sample_rate = get_be16(pb);
- url_fskip(pb, 1);
- compression = get_byte(pb);
- url_fskip(pb, 4);
+
+ if (data_size < 14)
+ return AVERROR_INVALIDDATA;
+ avio_skip(pb, 12);
+ st->codec->sample_rate = avio_rb16(pb);
+ if (data_size >= 16) {
+ avio_skip(pb, 1);
+ compression = avio_r8(pb);
+ }
break;
case ID_BODY:
+ iff->body_pos = avio_tell(pb);
iff->body_size = data_size;
- done = 1;
break;
case ID_CHAN:
- st->codec->channels = (get_be32(pb) < 6) ? 1 : 2;
+ if (data_size < 4)
+ return AVERROR_INVALIDDATA;
+ st->codec->channels = (avio_rb32(pb) < 6) ? 1 : 2;
break;
case ID_CMAP:
st->codec->extradata = av_malloc(data_size);
if (!st->codec->extradata)
return AVERROR(ENOMEM);
- if (get_buffer(pb, st->codec->extradata, data_size) < 0)
+ if (avio_read(pb, st->codec->extradata, data_size) < 0)
return AVERROR(EIO);
break;
case ID_BMHD:
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
- st->codec->width = get_be16(pb);
- st->codec->height = get_be16(pb);
- url_fskip(pb, 4); // x, y offset
- st->codec->bits_per_coded_sample = get_byte(pb);
- url_fskip(pb, 1); // masking
- compression = get_byte(pb);
- url_fskip(pb, 3); // paddding, transparent
- st->sample_aspect_ratio.num = get_byte(pb);
- st->sample_aspect_ratio.den = get_byte(pb);
- url_fskip(pb, 4); // source page width, height
+ if (data_size <= 8)
+ return AVERROR_INVALIDDATA;
+ st->codec->width = avio_rb16(pb);
+ st->codec->height = avio_rb16(pb);
+ avio_skip(pb, 4); // x, y offset
+ st->codec->bits_per_coded_sample = avio_r8(pb);
+ if (data_size >= 11) {
+ avio_skip(pb, 1); // masking
+ compression = avio_r8(pb);
+ }
+ if (data_size >= 16) {
+ avio_skip(pb, 3); // paddding, transparent
+ st->sample_aspect_ratio.num = avio_r8(pb);
+ st->sample_aspect_ratio.den = avio_r8(pb);
+ }
break;
case ID_ANNO:
- buf = av_malloc(data_size + 1);
- if (!buf)
- break;
- get_buffer(pb, buf, data_size);
- buf[data_size] = 0;
- av_metadata_set2(&s->metadata, "comment", buf, AV_METADATA_DONT_STRDUP_VAL);
+ case ID_TEXT:
+ metadata_tag = "comment";
break;
- default:
- url_fseek(pb, data_size + padding, SEEK_CUR);
+ case ID_AUTH:
+ metadata_tag = "artist";
+ break;
+
+ case ID_COPYRIGHT:
+ metadata_tag = "copyright";
+ break;
+
+ case ID_NAME:
+ metadata_tag = "title";
break;
}
+
+ if (metadata_tag) {
+ if ((res = get_metadata(s, metadata_tag, data_size)) < 0) {
+ av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!", metadata_tag);
+ return res;
+ }
+ }
+ avio_skip(pb, data_size - (avio_tell(pb) - orig_pos) + (data_size & 1));
}
+ avio_seek(pb, iff->body_pos, SEEK_SET);
+
switch(st->codec->codec_type) {
case AVMEDIA_TYPE_AUDIO:
- av_set_pts_info(st, 32, 1, st->codec->sample_rate);
+ av_set_pts_info(st, 32, 1, st->codec->sample_rate);
- switch(compression) {
- case COMP_NONE:
- st->codec->codec_id = CODEC_ID_PCM_S8;
- break;
- case COMP_FIB:
- st->codec->codec_id = CODEC_ID_8SVX_FIB;
- break;
- case COMP_EXP:
- st->codec->codec_id = CODEC_ID_8SVX_EXP;
- break;
- default:
- av_log(s, AV_LOG_ERROR, "iff: unknown compression method\n");
- return -1;
- }
+ switch(compression) {
+ case COMP_NONE:
+ st->codec->codec_id = CODEC_ID_PCM_S8;
+ break;
+ case COMP_FIB:
+ st->codec->codec_id = CODEC_ID_8SVX_FIB;
+ break;
+ case COMP_EXP:
+ st->codec->codec_id = CODEC_ID_8SVX_EXP;
+ break;
+ default:
+ av_log(s, AV_LOG_ERROR, "unknown compression method\n");
+ return -1;
+ }
- st->codec->bits_per_coded_sample = 8;
- st->codec->bit_rate = st->codec->channels * st->codec->sample_rate * st->codec->bits_per_coded_sample;
- st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample;
- break;
+ st->codec->bits_per_coded_sample = 8;
+ st->codec->bit_rate = st->codec->channels * st->codec->sample_rate * st->codec->bits_per_coded_sample;
+ st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample;
+ break;
case AVMEDIA_TYPE_VIDEO:
switch (compression) {
case BITMAP_RAW:
- if (st->codec->codec_tag == ID_ILBM) {
- st->codec->codec_id = CODEC_ID_IFF_ILBM;
- } else {
- st->codec->codec_id = CODEC_ID_RAWVIDEO;
- st->codec->pix_fmt = PIX_FMT_PAL8;
- st->codec->codec_tag = 0;
- }
+ st->codec->codec_id = CODEC_ID_IFF_ILBM;
break;
case BITMAP_BYTERUN1:
st->codec->codec_id = CODEC_ID_IFF_BYTERUN1;
AVPacket *pkt)
{
IffDemuxContext *iff = s->priv_data;
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
AVStream *st = s->streams[0];
int ret;
if(iff->sent_bytes >= iff->body_size)
return AVERROR(EIO);
- if(s->streams[0]->codec->channels == 2) {
+ if(st->codec->channels == 2) {
uint8_t sample_buffer[PACKET_SIZE];
- ret = get_buffer(pb, sample_buffer, PACKET_SIZE);
+ ret = avio_read(pb, sample_buffer, PACKET_SIZE);
if(av_new_packet(pkt, PACKET_SIZE) < 0) {
- av_log(s, AV_LOG_ERROR, "iff: cannot allocate packet \n");
+ av_log(s, AV_LOG_ERROR, "cannot allocate packet\n");
return AVERROR(ENOMEM);
}
interleave_stereo(sample_buffer, pkt->data, PACKET_SIZE);
- } else if (s->streams[0]->codec->codec_id == CODEC_ID_RAWVIDEO) {
- if(av_new_packet(pkt, iff->body_size + AVPALETTE_SIZE) < 0) {
- return AVERROR(ENOMEM);
- }
-
- ret = ff_cmap_read_palette(st->codec, (uint32_t*)(pkt->data + iff->body_size));
- if (ret < 0)
- return ret;
- av_freep(&st->codec->extradata);
- st->codec->extradata_size = 0;
-
- ret = get_buffer(pb, pkt->data, iff->body_size);
- } else if (s->streams[0]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
+ } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
ret = av_get_packet(pb, pkt, iff->body_size);
} else {
ret = av_get_packet(pb, pkt, PACKET_SIZE);
if(iff->sent_bytes == 0)
pkt->flags |= AV_PKT_FLAG_KEY;
- if(s->streams[0]->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
+ if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
iff->sent_bytes += PACKET_SIZE;
} else {
iff->sent_bytes = iff->body_size;
}
pkt->stream_index = 0;
- if(s->streams[0]->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
+ if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
pkt->pts = iff->audio_frame_count;
- iff->audio_frame_count += ret / s->streams[0]->codec->channels;
+ iff->audio_frame_count += ret / st->codec->channels;
}
return ret;
}
-AVInputFormat iff_demuxer = {
+AVInputFormat ff_iff_demuxer = {
"IFF",
NULL_IF_CONFIG_SMALL("IFF format"),
sizeof(IffDemuxContext),
projects / ffmpeg / blobdiff