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BMV demuxer and decoder

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Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Kostya Shishkov 2011-11-01 11:58:44 +01:00 committed by Martin Storsjö
parent 44729bc020
commit f545e00677
11 changed files with 510 additions and 2 deletions
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1
Changelog
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@ -99,6 +99,7 @@ easier to use. The changes are:
AVCodecContext deprecated. Codec private options should be used instead.
- Properly working defaults in libx264 wrapper, support for native presets.
- Encrypted OMA files support
- Discworld II BMV decoding support
version 0.7:

3
doc/general.texi
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@ -67,6 +67,7 @@ library:
@item Brute Force & Ignorance @tab @tab X
@tab Used in the game Flash Traffic: City of Angels.
@item BWF @tab X @tab X
@item Discworld II BMV @tab @tab X
@item Interplay C93 @tab @tab X
@tab Used in the game Cyberia from Interplay.
@item Delphine Software International CIN @tab @tab X
@ -376,6 +377,7 @@ following image formats are supported:
@tab AVS1-P2, JiZhun profile, encoding through external library libxavs
@item Delphine Software International CIN video @tab @tab X
@tab Codec used in Delphine Software International games.
@item Discworld II BMV Video @tab @tab X
@item Cinepak @tab @tab X
@item Cirrus Logic AccuPak @tab @tab X
@tab fourcc: CLJR
@ -608,6 +610,7 @@ following image formats are supported:
@tab Used in Bink and Smacker files in many games.
@item Delphine Software International CIN audio @tab @tab X
@tab Codec used in Delphine Software International games.
@item Discworld II BMV Audio @tab @tab X
@item COOK @tab @tab X
@tab All versions except 5.1 are supported.
@item DCA (DTS Coherent Acoustics) @tab @tab X

2
libavcodec/Makefile
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@ -94,6 +94,8 @@ OBJS-$(CONFIG_BINKAUDIO_DCT_DECODER) += binkaudio.o wma.o
OBJS-$(CONFIG_BINKAUDIO_RDFT_DECODER) += binkaudio.o wma.o
OBJS-$(CONFIG_BMP_DECODER) += bmp.o msrledec.o
OBJS-$(CONFIG_BMP_ENCODER) += bmpenc.o
OBJS-$(CONFIG_BMV_VIDEO_DECODER) += bmv.o
OBJS-$(CONFIG_BMV_AUDIO_DECODER) += bmv.o
OBJS-$(CONFIG_C93_DECODER) += c93.o
OBJS-$(CONFIG_CAVS_DECODER) += cavs.o cavsdec.o cavsdsp.o \
mpeg12data.o mpegvideo.o

2
libavcodec/allcodecs.c
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@ -81,6 +81,7 @@ void avcodec_register_all(void)
REGISTER_DECODER (BFI, bfi);
REGISTER_DECODER (BINK, bink);
REGISTER_ENCDEC (BMP, bmp);
REGISTER_DECODER (BMV_VIDEO, bmv_video);
REGISTER_DECODER (C93, c93);
REGISTER_DECODER (CAVS, cavs);
REGISTER_DECODER (CDGRAPHICS, cdgraphics);
@ -242,6 +243,7 @@ void avcodec_register_all(void)
REGISTER_DECODER (ATRAC3, atrac3);
REGISTER_DECODER (BINKAUDIO_DCT, binkaudio_dct);
REGISTER_DECODER (BINKAUDIO_RDFT, binkaudio_rdft);
REGISTER_DECODER (BMV_AUDIO, bmv_audio);
REGISTER_DECODER (COOK, cook);
REGISTER_DECODER (DCA, dca);
REGISTER_DECODER (DSICINAUDIO, dsicinaudio);

2
libavcodec/avcodec.h
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@ -219,6 +219,7 @@ enum CodecID {
CODEC_ID_G729,
#endif
CODEC_ID_UTVIDEO,
CODEC_ID_BMV_VIDEO,
/* various PCM "codecs" */
CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs
@ -359,6 +360,7 @@ enum CodecID {
CODEC_ID_8SVX_EXP,
CODEC_ID_8SVX_FIB,
#endif
CODEC_ID_BMV_AUDIO,
/* subtitle codecs */
CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs.

360
libavcodec/bmv.c Normal file
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@ -0,0 +1,360 @@
/*
* Discworld II BMV video and audio decoder
* Copyright (c) 2011 Konstantin Shishkov
*
* This file is part of Libav.
*
* 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.
*
* 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avcodec.h"
#include "bytestream.h"
enum BMVFlags{
BMV_NOP = 0,
BMV_END,
BMV_DELTA,
BMV_INTRA,
BMV_SCROLL = 0x04,
BMV_PALETTE = 0x08,
BMV_COMMAND = 0x10,
BMV_AUDIO = 0x20,
BMV_EXT = 0x40,
BMV_PRINT = 0x80
};
#define SCREEN_WIDE 640
#define SCREEN_HIGH 429
typedef struct BMVDecContext {
AVCodecContext *avctx;
AVFrame pic;
uint8_t *frame, frame_base[SCREEN_WIDE * (SCREEN_HIGH + 1)];
uint32_t pal[256];
const uint8_t *stream;
} BMVDecContext;
#define NEXT_BYTE(v) v = forward ? v + 1 : v - 1;
static int decode_bmv_frame(const uint8_t *source, int src_len, uint8_t *frame, int frame_off)
{
int val, saved_val = 0;
int tmplen = src_len;
const uint8_t *src, *source_end = source + src_len;
uint8_t *frame_end = frame + SCREEN_WIDE * SCREEN_HIGH;
uint8_t *dst, *dst_end;
int len, mask;
int forward = (frame_off <= -SCREEN_WIDE) || (frame_off >= 0);
int read_two_nibbles, flag;
int advance_mode;
int mode = 0;
int i;
if (src_len <= 0)
return -1;
if (forward) {
src = source;
dst = frame;
dst_end = frame_end;
} else {
src = source + src_len - 1;
dst = frame_end - 1;
dst_end = frame - 1;
}
for (;;) {
int shift = 0;
flag = 0;
/* The mode/len decoding is a bit strange:
* values are coded as variable-length codes with nibble units,
* code end is signalled by two top bits in the nibble being nonzero.
* And since data is bytepacked and we read two nibbles at a time,
* we may get a nibble belonging to the next code.
* Hence this convoluted loop.
*/
if (!mode || (tmplen == 4)) {
if (src < source || src >= source_end)
return -1;
val = *src;
read_two_nibbles = 1;
} else {
val = saved_val;
read_two_nibbles = 0;
}
if (!(val & 0xC)) {
for (;;) {
if (!read_two_nibbles) {
if (src < source || src >= source_end)
return -1;
shift += 2;
val |= *src << shift;
if (*src & 0xC)
break;
}
// two upper bits of the nibble is zero,
// so shift top nibble value down into their place
read_two_nibbles = 0;
shift += 2;
mask = (1 << shift) - 1;
val = ((val >> 2) & ~mask) | (val & mask);
NEXT_BYTE(src);
if ((val & (0xC << shift))) {
flag = 1;
break;
}
}
} else if (mode) {
flag = tmplen != 4;
}
if (flag) {
tmplen = 4;
} else {
saved_val = val >> (4 + shift);
tmplen = 0;
val &= (1 << (shift + 4)) - 1;
NEXT_BYTE(src);
}
advance_mode = val & 1;
len = (val >> 1) - 1;
mode += 1 + advance_mode;
if (mode >= 4)
mode -= 3;
if (FFABS(dst_end - dst) < len)
return -1;
switch (mode) {
case 1:
if (forward) {
if (dst - frame + SCREEN_WIDE < frame_off ||
frame_end - dst < frame_off + len)
return -1;
for (i = 0; i < len; i++)
dst[i] = dst[frame_off + i];
dst += len;
} else {
dst -= len;
if (dst - frame + SCREEN_WIDE < frame_off ||
frame_end - dst < frame_off + len)
return -1;
for (i = len - 1; i >= 0; i--)
dst[i] = dst[frame_off + i];
}
break;
case 2:
if (forward) {
if (source + src_len - src < len)
return -1;
memcpy(dst, src, len);
dst += len;
src += len;
} else {
if (src - source < len)
return -1;
dst -= len;
src -= len;
memcpy(dst, src, len);
}
break;
case 3:
val = forward ? dst[-1] : dst[1];
if (forward) {
memset(dst, val, len);
dst += len;
} else {
dst -= len;
memset(dst, val, len);
}
break;
default:
break;
}
if (dst == dst_end)
return 0;
}
return 0;
}
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *pkt)
{
BMVDecContext * const c = avctx->priv_data;
int type, scr_off;
int i;
uint8_t *srcptr, *outptr;
c->stream = pkt->data;
type = bytestream_get_byte(&c->stream);
if (type & BMV_AUDIO) {
int blobs = bytestream_get_byte(&c->stream);
if (pkt->size < blobs * 65 + 2) {
av_log(avctx, AV_LOG_ERROR, "Audio data doesn't fit in frame\n");
return AVERROR_INVALIDDATA;
}
c->stream += blobs * 65;
}
if (type & BMV_COMMAND) {
int command_size = (type & BMV_PRINT) ? 8 : 10;
if (c->stream - pkt->data + command_size > pkt->size) {
av_log(avctx, AV_LOG_ERROR, "Command data doesn't fit in frame\n");
return AVERROR_INVALIDDATA;
}
c->stream += command_size;
}
if (type & BMV_PALETTE) {
if (c->stream - pkt->data > pkt->size - 768) {
av_log(avctx, AV_LOG_ERROR, "Palette data doesn't fit in frame\n");
return AVERROR_INVALIDDATA;
}
for (i = 0; i < 256; i++)
c->pal[i] = bytestream_get_be24(&c->stream);
}
if (type & BMV_SCROLL) {
if (c->stream - pkt->data > pkt->size - 2) {
av_log(avctx, AV_LOG_ERROR, "Screen offset data doesn't fit in frame\n");
return AVERROR_INVALIDDATA;
}
scr_off = (int16_t)bytestream_get_le16(&c->stream);
} else if ((type & BMV_INTRA) == BMV_INTRA) {
scr_off = -640;
} else {
scr_off = 0;
}
if (decode_bmv_frame(c->stream, pkt->size - (c->stream - pkt->data), c->frame, scr_off)) {
av_log(avctx, AV_LOG_ERROR, "Error decoding frame data\n");
return AVERROR_INVALIDDATA;
}
memcpy(c->pic.data[1], c->pal, AVPALETTE_SIZE);
c->pic.palette_has_changed = type & BMV_PALETTE;
outptr = c->pic.data[0];
srcptr = c->frame;
for (i = 0; i < avctx->height; i++) {
memcpy(outptr, srcptr, avctx->width);
srcptr += avctx->width;
outptr += c->pic.linesize[0];
}
*data_size = sizeof(AVFrame);
*(AVFrame*)data = c->pic;
/* always report that the buffer was completely consumed */
return pkt->size;
}
static av_cold int decode_init(AVCodecContext *avctx)
{
BMVDecContext * const c = avctx->priv_data;
c->avctx = avctx;
avctx->pix_fmt = PIX_FMT_PAL8;
c->pic.reference = 1;
if (avctx->get_buffer(avctx, &c->pic) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
c->frame = c->frame_base + 640;
return 0;
}
static av_cold int decode_end(AVCodecContext *avctx)
{
BMVDecContext *c = avctx->priv_data;
if (c->pic.data[0])
avctx->release_buffer(avctx, &c->pic);
return 0;
}
static const int bmv_aud_mults[16] = {
16512, 8256, 4128, 2064, 1032, 516, 258, 192, 129, 88, 64, 56, 48, 40, 36, 32
};
static av_cold int bmv_aud_decode_init(AVCodecContext *avctx)
{
if (avctx->channels != 2) {
av_log(avctx, AV_LOG_INFO, "invalid number of channels\n");
return AVERROR(EINVAL);
}
avctx->sample_fmt = AV_SAMPLE_FMT_S16;
return 0;
}
static int bmv_aud_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
int blocks = 0, total_blocks, i;
int out_size;
int16_t *output_samples = data;
int scale[2];
total_blocks = *buf++;
if (buf_size < total_blocks * 65 + 1) {
av_log(avctx, AV_LOG_ERROR, "expected %d bytes, got %d\n",
total_blocks * 65 + 1, buf_size);
return AVERROR_INVALIDDATA;
}
out_size = total_blocks * 64 * sizeof(*output_samples);
if (*data_size < out_size) {
av_log(avctx, AV_LOG_ERROR, "Output buffer is too small\n");
return AVERROR(EINVAL);
}
for (blocks = 0; blocks < total_blocks; blocks++) {
uint8_t code = *buf++;
code = (code >> 1) | (code << 7);
scale[0] = bmv_aud_mults[code & 0xF];
scale[1] = bmv_aud_mults[code >> 4];
for (i = 0; i < 32; i++) {
*output_samples++ = av_clip_int16((scale[0] * (int8_t)*buf++) >> 5);
*output_samples++ = av_clip_int16((scale[1] * (int8_t)*buf++) >> 5);
}
}
*data_size = out_size;
return buf_size;
}
AVCodec ff_bmv_video_decoder = {
.name = "bmv_video",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_BMV_VIDEO,
.priv_data_size = sizeof(BMVDecContext),
.init = decode_init,
.close = decode_end,
.decode = decode_frame,
.long_name = NULL_IF_CONFIG_SMALL("Discworld II BMV video"),
};
AVCodec ff_bmv_audio_decoder = {
.name = "bmv_audio",
.type = AVMEDIA_TYPE_AUDIO,
.id = CODEC_ID_BMV_AUDIO,
.init = bmv_aud_decode_init,
.decode = bmv_aud_decode_frame,
.long_name = NULL_IF_CONFIG_SMALL("Discworld II BMV audio"),
};

2
libavcodec/version.h
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@ -21,7 +21,7 @@
#define AVCODEC_VERSION_H
#define LIBAVCODEC_VERSION_MAJOR 53
#define LIBAVCODEC_VERSION_MINOR 16
#define LIBAVCODEC_VERSION_MINOR 17
#define LIBAVCODEC_VERSION_MICRO 0
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \

1
libavformat/Makefile
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@ -46,6 +46,7 @@ OBJS-$(CONFIG_AVS_DEMUXER) += avs.o vocdec.o voc.o
OBJS-$(CONFIG_BETHSOFTVID_DEMUXER) += bethsoftvid.o
OBJS-$(CONFIG_BFI_DEMUXER) += bfi.o
OBJS-$(CONFIG_BINK_DEMUXER) += bink.o
OBJS-$(CONFIG_BMV_DEMUXER) += bmv.o
OBJS-$(CONFIG_C93_DEMUXER) += c93.o vocdec.o voc.o
OBJS-$(CONFIG_CAF_DEMUXER) += cafdec.o caf.o mov.o riff.o isom.o
OBJS-$(CONFIG_CAVSVIDEO_DEMUXER) += cavsvideodec.o rawdec.o

1
libavformat/allformats.c
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@ -70,6 +70,7 @@ void av_register_all(void)
REGISTER_DEMUXER (BETHSOFTVID, bethsoftvid);
REGISTER_DEMUXER (BFI, bfi);
REGISTER_DEMUXER (BINK, bink);
REGISTER_DEMUXER (BMV, bmv);
REGISTER_DEMUXER (C93, c93);
REGISTER_DEMUXER (CAF, caf);
REGISTER_MUXDEMUX (CAVSVIDEO, cavsvideo);

136
libavformat/bmv.c Normal file
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@ -0,0 +1,136 @@
/*
* Discworld II BMV demuxer
* Copyright (c) 2011 Konstantin Shishkov.
*
* This file is part of Libav.
*
* 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.
*
* 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avformat.h"
enum BMVFlags {
BMV_NOP = 0,
BMV_END,
BMV_DELTA,
BMV_INTRA,
BMV_AUDIO = 0x20,
};
typedef struct BMVContext {
uint8_t *packet;
int size;
int get_next;
int64_t audio_pos;
} BMVContext;
static int bmv_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
AVStream *st, *ast;
BMVContext *c = s->priv_data;
st = avformat_new_stream(s, 0);
if (!st)
return AVERROR(ENOMEM);
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = CODEC_ID_BMV_VIDEO;
st->codec->width = 640;
st->codec->height = 429;
st->codec->pix_fmt = PIX_FMT_PAL8;
av_set_pts_info(st, 16, 1, 12);
ast = avformat_new_stream(s, 0);
if (!ast)
return AVERROR(ENOMEM);
ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
ast->codec->codec_id = CODEC_ID_BMV_AUDIO;
ast->codec->channels = 2;
ast->codec->sample_rate = 22050;
av_set_pts_info(ast, 16, 1, 22050);
c->get_next = 1;
c->audio_pos = 0;
return 0;
}
static int bmv_read_packet(AVFormatContext *s, AVPacket *pkt)
{
BMVContext *c = s->priv_data;
int type;
void *tmp;
while (c->get_next) {
if (s->pb->eof_reached)
return AVERROR_EOF;
type = avio_r8(s->pb);
if (type == BMV_NOP)
continue;
if (type == BMV_END)
return AVERROR_EOF;
c->size = avio_rl24(s->pb);
if (!c->size)
return AVERROR_INVALIDDATA;
tmp = av_realloc(c->packet, c->size + 1);
if (!tmp)
return AVERROR(ENOMEM);
c->packet = tmp;
c->packet[0] = type;
if (avio_read(s->pb, c->packet + 1, c->size) != c->size)
return AVERROR(EIO);
if (type & BMV_AUDIO) {
int audio_size = c->packet[1] * 65 + 1;
if (audio_size >= c->size) {
av_log(s, AV_LOG_ERROR, "Reported audio size %d is bigger than packet size (%d)\n",
audio_size, c->size);
return AVERROR_INVALIDDATA;
}
if (av_new_packet(pkt, audio_size) < 0)
return AVERROR(ENOMEM);
memcpy(pkt->data, c->packet + 1, pkt->size);
pkt->stream_index = 1;
pkt->pts = c->audio_pos;
pkt->duration = c->packet[1] * 32;
c->audio_pos += pkt->duration;
c->get_next = 0;
return pkt->size;
} else
break;
}
if (av_new_packet(pkt, c->size + 1) < 0)
return AVERROR(ENOMEM);
pkt->stream_index = 0;
c->get_next = 1;
memcpy(pkt->data, c->packet, pkt->size);
return pkt->size;
}
static int bmv_read_close(AVFormatContext *s)
{
BMVContext *c = s->priv_data;
av_freep(&c->packet);
return 0;
}
AVInputFormat ff_bmv_demuxer = {
.name = "bmv",
.long_name = NULL_IF_CONFIG_SMALL("Discworld II BMV"),
.priv_data_size = sizeof(BMVContext),
.read_header = bmv_read_header,
.read_packet = bmv_read_packet,
.read_close = bmv_read_close,
.extensions = "bmv"
};

2
libavformat/version.h
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@ -24,7 +24,7 @@
#include "libavutil/avutil.h"
#define LIBAVFORMAT_VERSION_MAJOR 53
#define LIBAVFORMAT_VERSION_MINOR 13
#define LIBAVFORMAT_VERSION_MINOR 14
#define LIBAVFORMAT_VERSION_MICRO 0
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \