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author | Peter Ross <pross@xvid.org> | 2010-02-03 09:57:21 +0000 |
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committer | Peter Ross <pross@xvid.org> | 2010-02-03 09:57:21 +0000 |
commit | 02c4f626a8f3d6ffb9e306e8f4193efe6592402c (patch) | |
tree | 956da0ebe0b8b388a9ffa79366f80c94eb0519ea | |
parent | b9e06dddb7d5ac3c5c75377fa796b267427679d9 (diff) | |
download | ffmpeg-streaming-02c4f626a8f3d6ffb9e306e8f4193efe6592402c.zip ffmpeg-streaming-02c4f626a8f3d6ffb9e306e8f4193efe6592402c.tar.gz |
Extend IFF demuxer to parse PBM/ILBM bitmap chunks
Originally committed as revision 21623 to svn://svn.ffmpeg.org/ffmpeg/trunk
-rw-r--r-- | libavformat/iff.c | 99 |
1 files changed, 88 insertions, 11 deletions
diff --git a/libavformat/iff.c b/libavformat/iff.c index 812ed23..0778bf4 100644 --- a/libavformat/iff.c +++ b/libavformat/iff.c @@ -1,6 +1,7 @@ /* * IFF (.iff) file demuxer * Copyright (c) 2008 Jaikrishnan Menon <realityman@gmx.net> + * Copyright (c) 2010 Peter Ross <pross@xvid.org> * * This file is part of FFmpeg. * @@ -35,6 +36,10 @@ #define ID_ATAK MKTAG('A','T','A','K') #define ID_RLSE MKTAG('R','L','S','E') #define ID_CHAN MKTAG('C','H','A','N') +#define ID_PBM MKTAG('P','B','M',' ') +#define ID_ILBM MKTAG('I','L','B','M') +#define ID_BMHD MKTAG('B','M','H','D') +#define ID_CMAP MKTAG('C','M','A','P') #define ID_FORM MKTAG('F','O','R','M') #define ID_ANNO MKTAG('A','N','N','O') @@ -54,6 +59,7 @@ #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 struct { uint32_t body_size; @@ -79,7 +85,7 @@ static int iff_probe(AVProbeData *p) const uint8_t *d = p->buf; if ( AV_RL32(d) == ID_FORM && - AV_RL32(d+8) == ID_8SVX) + (AV_RL32(d+8) == ID_8SVX || AV_RL32(d+8) == ID_PBM || AV_RL32(d+8) == ID_ILBM) ) return AVPROBE_SCORE_MAX; return 0; } @@ -92,13 +98,16 @@ static int iff_read_header(AVFormatContext *s, AVStream *st; uint32_t chunk_id, data_size; int padding, done = 0; + int compression = -1; st = av_new_stream(s, 0); if (!st) return AVERROR(ENOMEM); st->codec->channels = 1; - url_fskip(pb, 12); + url_fskip(pb, 8); + // codec_tag used by ByteRun1 decoder to distinguish progressive (PBM) and interlaced (ILBM) content + st->codec->codec_tag = get_le32(pb); while(!done && !url_feof(pb)) { chunk_id = get_le32(pb); @@ -107,10 +116,11 @@ static int iff_read_header(AVFormatContext *s, switch(chunk_id) { case ID_VHDR: + st->codec->codec_type = CODEC_TYPE_AUDIO; url_fskip(pb, 12); st->codec->sample_rate = get_be16(pb); url_fskip(pb, 1); - st->codec->codec_tag = get_byte(pb); + compression = get_byte(pb); url_fskip(pb, 4); break; @@ -123,19 +133,40 @@ static int iff_read_header(AVFormatContext *s, st->codec->channels = (get_be32(pb) < 6) ? 1 : 2; break; + case ID_CMAP: + st->codec->extradata_size = data_size; + st->codec->extradata = av_malloc(data_size); + if (!st->codec->extradata) + return AVERROR(ENOMEM); + if (get_buffer(pb, st->codec->extradata, data_size) < 0) + return AVERROR(EIO); + break; + + case ID_BMHD: + st->codec->codec_type = CODEC_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 + break; + default: url_fseek(pb, data_size + padding, SEEK_CUR); break; } } - if(!st->codec->sample_rate) - return AVERROR_INVALIDDATA; - + switch(st->codec->codec_type) { + case CODEC_TYPE_AUDIO: av_set_pts_info(st, 32, 1, st->codec->sample_rate); - st->codec->codec_type = CODEC_TYPE_AUDIO; - switch(st->codec->codec_tag) { + switch(compression) { case COMP_NONE: st->codec->codec_id = CODEC_ID_PCM_S8; break; @@ -153,18 +184,45 @@ static int iff_read_header(AVFormatContext *s, 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 CODEC_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; + } + break; + case BITMAP_BYTERUN1: + st->codec->codec_id = CODEC_ID_IFF_BYTERUN1; + break; + default: + av_log(s, AV_LOG_ERROR, "unknown compression method\n"); + return AVERROR_INVALIDDATA; + } + break; + default: + return -1; + } return 0; } +int ff_cmap_read_palette(AVCodecContext *avctx, uint32_t *pal); + static int iff_read_packet(AVFormatContext *s, AVPacket *pkt) { IffDemuxContext *iff = s->priv_data; ByteIOContext *pb = s->pb; + AVStream *st = s->streams[0]; int ret; - if(iff->sent_bytes > iff->body_size) + if(iff->sent_bytes >= iff->body_size) return AVERROR(EIO); if(s->streams[0]->codec->channels == 2) { @@ -176,18 +234,37 @@ static int iff_read_packet(AVFormatContext *s, return AVERROR(ENOMEM); } interleave_stereo(sample_buffer, pkt->data, PACKET_SIZE); - } - else { + } 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 == CODEC_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 |= PKT_FLAG_KEY; + if(s->streams[0]->codec->codec_type == CODEC_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 == CODEC_TYPE_AUDIO) { pkt->pts = iff->audio_frame_count; iff->audio_frame_count += ret / s->streams[0]->codec->channels; + } return ret; } |