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Diffstat (limited to 'ffmpeg1/libavformat/iff.c')
-rw-r--r--ffmpeg1/libavformat/iff.c485
1 files changed, 0 insertions, 485 deletions
diff --git a/ffmpeg1/libavformat/iff.c b/ffmpeg1/libavformat/iff.c
deleted file mode 100644
index 1efc147..0000000
--- a/ffmpeg1/libavformat/iff.c
+++ /dev/null
@@ -1,485 +0,0 @@
-/*
- * 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.
- *
- * 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.
- *
- * 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 FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file
- * IFF file demuxer
- * by Jaikrishnan Menon
- * for more information on the .iff file format, visit:
- * http://wiki.multimedia.cx/index.php?title=IFF
- */
-
-#include "libavutil/avassert.h"
-#include "libavutil/channel_layout.h"
-#include "libavutil/intreadwrite.h"
-#include "libavutil/dict.h"
-#include "libavcodec/bytestream.h"
-#include "avformat.h"
-#include "internal.h"
-
-#define ID_8SVX MKTAG('8','S','V','X')
-#define ID_16SV MKTAG('1','6','S','V')
-#define ID_MAUD MKTAG('M','A','U','D')
-#define ID_MHDR MKTAG('M','H','D','R')
-#define ID_MDAT MKTAG('M','D','A','T')
-#define ID_VHDR MKTAG('V','H','D','R')
-#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_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_RGB8 MKTAG('R','G','B','8')
-#define ID_RGBN MKTAG('R','G','B','N')
-
-#define ID_FORM MKTAG('F','O','R','M')
-#define ID_ANNO MKTAG('A','N','N','O')
-#define ID_AUTH MKTAG('A','U','T','H')
-#define ID_CHRS MKTAG('C','H','R','S')
-#define ID_COPYRIGHT MKTAG('(','c',')',' ')
-#define ID_CSET MKTAG('C','S','E','T')
-#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_DBOD MKTAG('D','B','O','D')
-#define ID_DPEL MKTAG('D','P','E','L')
-#define ID_DLOC MKTAG('D','L','O','C')
-#define ID_TVDC MKTAG('T','V','D','C')
-
-#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 41
-
-typedef enum {
- COMP_NONE,
- COMP_FIB,
- COMP_EXP
-} svx8_compression_type;
-
-typedef struct {
- int64_t body_pos;
- int64_t body_end;
- uint32_t body_size;
- svx8_compression_type svx8_compression;
- unsigned maud_bits;
- unsigned maud_compression;
- unsigned 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
- uint8_t tvdc[32]; ///< TVDC lookup table
-} IffDemuxContext;
-
-/* 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_dict_set(&s->metadata, tag, buf, AV_DICT_DONT_STRDUP_VAL);
- return 0;
-}
-
-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_16SV ||
- AV_RL32(d+8) == ID_MAUD ||
- AV_RL32(d+8) == ID_PBM ||
- AV_RL32(d+8) == ID_ACBM ||
- AV_RL32(d+8) == ID_DEEP ||
- AV_RL32(d+8) == ID_ILBM ||
- AV_RL32(d+8) == ID_RGB8 ||
- AV_RL32(d+8) == ID_RGBN) )
- 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 const uint8_t deep_bgra[] = {0, 0, 0, 4, 0, 3, 0, 8, 0, 2, 0, 8, 0, 1, 0, 8};
-static const uint8_t deep_argb[] = {0, 0, 0, 4, 0,17, 0, 8, 0, 1, 0, 8, 0, 2, 0, 8};
-static const uint8_t deep_abgr[] = {0, 0, 0, 4, 0,17, 0, 8, 0, 3, 0, 8, 0, 2, 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;
- uint32_t screenmode = 0, num, den;
- unsigned transparency = 0;
- unsigned masking = 0; // no mask
- uint8_t fmt[16];
- int fmt_size;
-
- st = avformat_new_stream(s, NULL);
- if (!st)
- return AVERROR(ENOMEM);
-
- st->codec->channels = 1;
- st->codec->channel_layout = AV_CH_LAYOUT_MONO;
- avio_skip(pb, 8);
- // codec_tag used by ByteRun1 decoder to distinguish progressive (PBM) and interlaced (ILBM) content
- st->codec->codec_tag = avio_rl32(pb);
- iff->bitmap_compression = -1;
- iff->svx8_compression = -1;
- iff->maud_bits = -1;
- iff->maud_compression = -1;
-
- while(!url_feof(pb)) {
- 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;
-
- 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);
- iff->svx8_compression = avio_r8(pb);
- }
- break;
-
- case ID_MHDR:
- st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
-
- if (data_size < 32)
- return AVERROR_INVALIDDATA;
- avio_skip(pb, 4);
- iff->maud_bits = avio_rb16(pb);
- avio_skip(pb, 2);
- num = avio_rb32(pb);
- den = avio_rb16(pb);
- if (!den)
- return AVERROR_INVALIDDATA;
- avio_skip(pb, 2);
- st->codec->sample_rate = num / den;
- st->codec->channels = avio_rb16(pb);
- iff->maud_compression = avio_rb16(pb);
- if (st->codec->channels == 1)
- st->codec->channel_layout = AV_CH_LAYOUT_MONO;
- else if (st->codec->channels == 2)
- st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
- break;
-
- case ID_ABIT:
- case ID_BODY:
- case ID_DBOD:
- case ID_MDAT:
- iff->body_pos = avio_tell(pb);
- iff->body_end = iff->body_pos + data_size;
- iff->body_size = data_size;
- break;
-
- case ID_CHAN:
- if (data_size < 4)
- return AVERROR_INVALIDDATA;
- if (avio_rb32(pb) < 6) {
- st->codec->channels = 1;
- st->codec->channel_layout = AV_CH_LAYOUT_MONO;
- } else {
- st->codec->channels = 2;
- st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
- }
- break;
-
- case ID_CAMG:
- if (data_size < 4)
- return AVERROR_INVALIDDATA;
- screenmode = avio_rb32(pb);
- break;
-
- case ID_CMAP:
- if (data_size < 3 || data_size > 768 || data_size % 3) {
- av_log(s, AV_LOG_ERROR, "Invalid CMAP chunk size %d\n",
- data_size);
- return AVERROR_INVALIDDATA;
- }
- 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 + IFF_EXTRA_VIDEO_SIZE, data_size) < 0)
- return AVERROR(EIO);
- break;
-
- case ID_BMHD:
- 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);
- avio_skip(pb, 4); // x, y offset
- st->codec->bits_per_coded_sample = 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) {
- st->sample_aspect_ratio.num = avio_r8(pb);
- st->sample_aspect_ratio.den = avio_r8(pb);
- }
- break;
-
- 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 if (fmt_size == sizeof(deep_bgra) && !memcmp(fmt, deep_bgra, sizeof(deep_bgra)))
- st->codec->pix_fmt = AV_PIX_FMT_BGRA;
- else if (fmt_size == sizeof(deep_argb) && !memcmp(fmt, deep_argb, sizeof(deep_argb)))
- st->codec->pix_fmt = AV_PIX_FMT_ARGB;
- else if (fmt_size == sizeof(deep_abgr) && !memcmp(fmt, deep_abgr, sizeof(deep_abgr)))
- st->codec->pix_fmt = AV_PIX_FMT_ABGR;
- else {
- avpriv_request_sample(s, "color format %.16s", fmt);
- return AVERROR_PATCHWELCOME;
- }
- break;
-
- 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);
- 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_DLOC:
- if (data_size < 4)
- return AVERROR_INVALIDDATA;
- st->codec->width = avio_rb16(pb);
- st->codec->height = avio_rb16(pb);
- break;
-
- case ID_TVDC:
- if (data_size < sizeof(iff->tvdc))
- return AVERROR_INVALIDDATA;
- res = avio_read(pb, iff->tvdc, sizeof(iff->tvdc));
- if (res < 0)
- return res;
- 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!\n", 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:
- avpriv_set_pts_info(st, 32, 1, st->codec->sample_rate);
-
- if (st->codec->codec_tag == ID_16SV)
- st->codec->codec_id = AV_CODEC_ID_PCM_S16BE_PLANAR;
- else if (st->codec->codec_tag == ID_MAUD) {
- if (iff->maud_bits == 8 && !iff->maud_compression) {
- st->codec->codec_id = AV_CODEC_ID_PCM_U8;
- } else if (iff->maud_bits == 16 && !iff->maud_compression) {
- st->codec->codec_id = AV_CODEC_ID_PCM_S16BE;
- } else if (iff->maud_bits == 8 && iff->maud_compression == 2) {
- st->codec->codec_id = AV_CODEC_ID_PCM_ALAW;
- } else if (iff->maud_bits == 8 && iff->maud_compression == 3) {
- st->codec->codec_id = AV_CODEC_ID_PCM_MULAW;
- } else {
- avpriv_request_sample(s, "compression %d and bit depth %d", iff->maud_compression, iff->maud_bits);
- return AVERROR_PATCHWELCOME;
- }
-
- st->codec->bits_per_coded_sample =
- av_get_bits_per_sample(st->codec->codec_id);
-
- st->codec->block_align =
- st->codec->bits_per_coded_sample * st->codec->channels / 8;
- } else {
- switch (iff->svx8_compression) {
- case COMP_NONE:
- st->codec->codec_id = AV_CODEC_ID_PCM_S8_PLANAR;
- break;
- case COMP_FIB:
- st->codec->codec_id = AV_CODEC_ID_8SVX_FIB;
- break;
- case COMP_EXP:
- st->codec->codec_id = AV_CODEC_ID_8SVX_EXP;
- break;
- default:
- av_log(s, AV_LOG_ERROR,
- "Unknown SVX8 compression method '%d'\n", iff->svx8_compression);
- return -1;
- }
- }
-
- st->codec->bits_per_coded_sample = av_get_bits_per_sample(st->codec->codec_id);
- 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:
- 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);
- }
- av_assert0(st->codec->extradata_size >= IFF_EXTRA_VIDEO_SIZE);
- 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);
- bytestream_put_buffer(&buf, iff->tvdc, sizeof(iff->tvdc));
- st->codec->codec_id = AV_CODEC_ID_IFF_ILBM;
- break;
- default:
- return -1;
- }
-
- return 0;
-}
-
-static int iff_read_packet(AVFormatContext *s,
- AVPacket *pkt)
-{
- IffDemuxContext *iff = s->priv_data;
- AVIOContext *pb = s->pb;
- AVStream *st = s->streams[0];
- int ret;
- int64_t pos = avio_tell(pb);
-
- if (pos >= iff->body_end)
- return AVERROR_EOF;
-
- if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
- if (st->codec->codec_tag == ID_MAUD) {
- ret = av_get_packet(pb, pkt, FFMIN(iff->body_end - pos, 1024 * st->codec->block_align));
- } else {
- 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 (pos == iff->body_pos)
- pkt->flags |= AV_PKT_FLAG_KEY;
- if (ret < 0)
- return ret;
- pkt->stream_index = 0;
- return ret;
-}
-
-AVInputFormat ff_iff_demuxer = {
- .name = "iff",
- .long_name = NULL_IF_CONFIG_SMALL("IFF (Interchange File Format)"),
- .priv_data_size = sizeof(IffDemuxContext),
- .read_probe = iff_probe,
- .read_header = iff_read_header,
- .read_packet = iff_read_packet,
- .flags = AVFMT_GENERIC_INDEX,
-};
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 23:25:11 +0000