diff options
Diffstat (limited to 'libavformat/iff.c')
-rw-r--r-- | libavformat/iff.c | 187 |
1 files changed, 147 insertions, 40 deletions
diff --git a/libavformat/iff.c b/libavformat/iff.c index c2bc283..d559ad3 100644 --- a/libavformat/iff.c +++ b/libavformat/iff.c @@ -1,23 +1,22 @@ /* - * 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 Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * FFmpeg 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. * - * Libav is distributed in the hope that it will be useful, + * FFmpeg 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -29,6 +28,8 @@ * http://wiki.multimedia.cx/index.php?title=IFF */ +#include "libavcodec/bytestream.h" +#include "libavutil/avassert.h" #include "libavutil/intreadwrite.h" #include "libavutil/dict.h" #include "avformat.h" @@ -42,7 +43,11 @@ #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_DGBL MKTAG('D','G','B','L') +#define ID_CAMG MKTAG('C','A','M','G') #define ID_CMAP MKTAG('C','M','A','P') +#define ID_ACBM MKTAG('A','C','B','M') +#define ID_DEEP MKTAG('D','E','E','P') #define ID_FORM MKTAG('F','O','R','M') #define ID_ANNO MKTAG('A','N','N','O') @@ -53,13 +58,25 @@ #define ID_FVER MKTAG('F','V','E','R') #define ID_NAME MKTAG('N','A','M','E') #define ID_TEXT MKTAG('T','E','X','T') +#define ID_ABIT MKTAG('A','B','I','T') #define ID_BODY MKTAG('B','O','D','Y') -#define ID_ANNO MKTAG('A','N','N','O') +#define ID_DBOD MKTAG('D','B','O','D') +#define ID_DPEL MKTAG('D','P','E','L') #define LEFT 2 #define RIGHT 4 #define STEREO 6 +/** + * This number of bytes if added at the beginning of each AVPacket + * which contain additional information about video properties + * which has to be shared between demuxer and decoder. + * This number may change between frames, e.g. the demuxer might + * set it to smallest possible size of 2 to indicate that there's + * no extradata changing in this frame. + */ +#define IFF_EXTRA_VIDEO_SIZE 9 + typedef enum { COMP_NONE, COMP_FIB, @@ -75,9 +92,15 @@ typedef struct { uint64_t body_pos; uint32_t body_size; uint32_t sent_bytes; + svx8_compression_type svx8_compression; + bitmap_compression_type bitmap_compression; ///< delta compression method used + unsigned bpp; ///< bits per plane to decode (differs from bits_per_coded_sample if HAM) + unsigned ham; ///< 0 if non-HAM or number of hold bits (6 for bpp > 6, 4 otherwise) + unsigned flags; ///< 1 for EHB, 0 is no extra half darkening + unsigned transparency; ///< transparency color index in palette + unsigned masking; ///< masking method used } IffDemuxContext; - /* Metadata string read */ static int get_metadata(AVFormatContext *s, const char *const tag, @@ -101,19 +124,31 @@ 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_PBM || AV_RL32(d+8) == ID_ILBM) ) + if ( AV_RL32(d) == ID_FORM && + (AV_RL32(d+8) == ID_8SVX || + AV_RL32(d+8) == ID_PBM || + AV_RL32(d+8) == ID_ACBM || + AV_RL32(d+8) == ID_DEEP || + AV_RL32(d+8) == ID_ILBM) ) return AVPROBE_SCORE_MAX; return 0; } +static const uint8_t deep_rgb24[] = {0, 0, 0, 3, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8}; +static const uint8_t deep_rgba[] = {0, 0, 0, 4, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8}; + static int iff_read_header(AVFormatContext *s) { IffDemuxContext *iff = s->priv_data; AVIOContext *pb = s->pb; AVStream *st; + uint8_t *buf; uint32_t chunk_id, data_size; - int compression = -1; + uint32_t screenmode = 0; + unsigned transparency = 0; + unsigned masking = 0; // no mask + uint8_t fmt[16]; + int fmt_size; st = avformat_new_stream(s, NULL); if (!st) @@ -124,7 +159,7 @@ static int iff_read_header(AVFormatContext *s) // codec_tag used by ByteRun1 decoder to distinguish progressive (PBM) and interlaced (ILBM) content st->codec->codec_tag = avio_rl32(pb); - while(!pb->eof_reached) { + while(!url_feof(pb)) { uint64_t orig_pos; int res; const char *metadata_tag = NULL; @@ -142,11 +177,13 @@ static int iff_read_header(AVFormatContext *s) st->codec->sample_rate = avio_rb16(pb); if (data_size >= 16) { avio_skip(pb, 1); - compression = avio_r8(pb); + iff->svx8_compression = avio_r8(pb); } break; + case ID_ABIT: case ID_BODY: + case ID_DBOD: iff->body_pos = avio_tell(pb); iff->body_size = data_size; break; @@ -157,16 +194,23 @@ static int iff_read_header(AVFormatContext *s) st->codec->channels = (avio_rb32(pb) < 6) ? 1 : 2; break; + case ID_CAMG: + if (data_size < 4) + return AVERROR_INVALIDDATA; + screenmode = avio_rb32(pb); + break; + case ID_CMAP: - st->codec->extradata_size = data_size; - st->codec->extradata = av_malloc(data_size); + st->codec->extradata_size = data_size + IFF_EXTRA_VIDEO_SIZE; + st->codec->extradata = av_malloc(data_size + IFF_EXTRA_VIDEO_SIZE + FF_INPUT_BUFFER_PADDING_SIZE); if (!st->codec->extradata) return AVERROR(ENOMEM); - if (avio_read(pb, st->codec->extradata, data_size) < 0) + if (avio_read(pb, st->codec->extradata + IFF_EXTRA_VIDEO_SIZE, data_size) < 0) return AVERROR(EIO); break; case ID_BMHD: + iff->bitmap_compression = -1; st->codec->codec_type = AVMEDIA_TYPE_VIDEO; if (data_size <= 8) return AVERROR_INVALIDDATA; @@ -174,38 +218,62 @@ static int iff_read_header(AVFormatContext *s) 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 >= 10) + masking = avio_r8(pb); + if (data_size >= 11) + iff->bitmap_compression = avio_r8(pb); + if (data_size >= 14) { + avio_skip(pb, 1); // padding + transparency = avio_rb16(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: - case ID_TEXT: - metadata_tag = "comment"; - break; - - case ID_AUTH: - metadata_tag = "artist"; + case ID_DPEL: + if (data_size < 4 || (data_size & 3)) + return AVERROR_INVALIDDATA; + if ((fmt_size = avio_read(pb, fmt, sizeof(fmt))) < 0) + return fmt_size; + if (fmt_size == sizeof(deep_rgb24) && !memcmp(fmt, deep_rgb24, sizeof(deep_rgb24))) + st->codec->pix_fmt = AV_PIX_FMT_RGB24; + else if (fmt_size == sizeof(deep_rgba) && !memcmp(fmt, deep_rgba, sizeof(deep_rgba))) + st->codec->pix_fmt = AV_PIX_FMT_RGBA; + else { + av_log_ask_for_sample(s, "unsupported color format\n"); + return AVERROR_PATCHWELCOME; + } break; - case ID_COPYRIGHT: - metadata_tag = "copyright"; + case ID_DGBL: + st->codec->codec_type = AVMEDIA_TYPE_VIDEO; + if (data_size < 8) + return AVERROR_INVALIDDATA; + st->codec->width = avio_rb16(pb); + st->codec->height = avio_rb16(pb); + iff->bitmap_compression = avio_rb16(pb); + if (iff->bitmap_compression != 0) { + av_log(s, AV_LOG_ERROR, + "compression %i not supported\n", iff->bitmap_compression); + return AVERROR_PATCHWELCOME; + } + st->sample_aspect_ratio.num = avio_r8(pb); + st->sample_aspect_ratio.den = avio_r8(pb); + st->codec->bits_per_coded_sample = 24; break; - case ID_NAME: - metadata_tag = "title"; - break; + case ID_ANNO: + case ID_TEXT: metadata_tag = "comment"; break; + 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); + av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag); return res; } } @@ -218,7 +286,7 @@ static int iff_read_header(AVFormatContext *s) case AVMEDIA_TYPE_AUDIO: avpriv_set_pts_info(st, 32, 1, st->codec->sample_rate); - switch(compression) { + switch (iff->svx8_compression) { case COMP_NONE: st->codec->codec_id = AV_CODEC_ID_PCM_S8_PLANAR; break; @@ -229,17 +297,42 @@ static int iff_read_header(AVFormatContext *s) st->codec->codec_id = AV_CODEC_ID_8SVX_EXP; break; default: - av_log(s, AV_LOG_ERROR, "unknown compression method\n"); + av_log(s, AV_LOG_ERROR, + "Unknown SVX8 compression method '%d'\n", iff->svx8_compression); return -1; } - st->codec->bits_per_coded_sample = 8; + st->codec->bits_per_coded_sample = iff->svx8_compression == COMP_NONE ? 8 : 4; 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) { + iff->bpp = st->codec->bits_per_coded_sample; + if ((screenmode & 0x800 /* Hold And Modify */) && iff->bpp <= 8) { + iff->ham = iff->bpp > 6 ? 6 : 4; + st->codec->bits_per_coded_sample = 24; + } + iff->flags = (screenmode & 0x80 /* Extra HalfBrite */) && iff->bpp <= 8; + iff->masking = masking; + iff->transparency = transparency; + + if (!st->codec->extradata) { + st->codec->extradata_size = IFF_EXTRA_VIDEO_SIZE; + st->codec->extradata = av_malloc(IFF_EXTRA_VIDEO_SIZE + FF_INPUT_BUFFER_PADDING_SIZE); + if (!st->codec->extradata) + return AVERROR(ENOMEM); + } + buf = st->codec->extradata; + bytestream_put_be16(&buf, IFF_EXTRA_VIDEO_SIZE); + bytestream_put_byte(&buf, iff->bitmap_compression); + bytestream_put_byte(&buf, iff->bpp); + bytestream_put_byte(&buf, iff->ham); + bytestream_put_byte(&buf, iff->flags); + bytestream_put_be16(&buf, iff->transparency); + bytestream_put_byte(&buf, iff->masking); + + switch (iff->bitmap_compression) { case BITMAP_RAW: st->codec->codec_id = AV_CODEC_ID_IFF_ILBM; break; @@ -247,7 +340,8 @@ static int iff_read_header(AVFormatContext *s) st->codec->codec_id = AV_CODEC_ID_IFF_BYTERUN1; break; default: - av_log(s, AV_LOG_ERROR, "unknown compression method\n"); + av_log(s, AV_LOG_ERROR, + "Unknown bitmap compression method '%d'\n", iff->bitmap_compression); return AVERROR_INVALIDDATA; } break; @@ -263,14 +357,27 @@ static int iff_read_packet(AVFormatContext *s, { IffDemuxContext *iff = s->priv_data; AVIOContext *pb = s->pb; + AVStream *st = s->streams[0]; int ret; if(iff->sent_bytes >= iff->body_size) return AVERROR_EOF; - ret = av_get_packet(pb, pkt, iff->body_size); - if (ret < 0) - return ret; + if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { + ret = av_get_packet(pb, pkt, iff->body_size); + } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { + uint8_t *buf; + + if (av_new_packet(pkt, iff->body_size + 2) < 0) { + return AVERROR(ENOMEM); + } + + buf = pkt->data; + bytestream_put_be16(&buf, 2); + ret = avio_read(pb, buf, iff->body_size); + } else { + av_assert0(0); + } if(iff->sent_bytes == 0) pkt->flags |= AV_PKT_FLAG_KEY; |