Commit 9a0ddd09 authored by Anssi Hannula's avatar Anssi Hannula Committed by Diego Biurrun

Interplay C93 demuxer and video decoder

patch by Anssi Hannula, anssi.hannula gmail com

Originally committed as revision 8643 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent fe037229
......@@ -77,6 +77,7 @@ version <next>
- DNxHD decoder
- Gamecube movie (.THP) playback system
- Blackfin optimizations
- Interplay C93 demuxer and video decoder
version 0.4.9-pre1:
......
......@@ -903,6 +903,8 @@ library:
different game cutscenes repacked for use with ScummVM.
@item THP @tab @tab X
@tab Used on the Nintendo GameCube (video only)
@item C93 @tab @tab X
@tab Used in the game Cyberia from Interplay.
@end multitable
@code{X} means that encoding (resp. decoding) is supported.
......@@ -1012,6 +1014,7 @@ following image formats are supported:
@item Tiertex Seq Video @tab @tab X @tab Codec used in DOS CDROM FlashBack game.
@item DXA Video @tab @tab X @tab Codec originally used in Feeble Files game.
@item AVID DNxHD @tab @tab X @tab aka SMPTE VC3
@item C93 Video @tab @tab X @tab Codec used in Cyberia game.
@end multitable
@code{X} means that encoding (resp. decoding) is supported.
......
......@@ -56,6 +56,7 @@ OBJS-$(CONFIG_ASV2_ENCODER) += asv1.o
OBJS-$(CONFIG_AVS_DECODER) += avs.o
OBJS-$(CONFIG_BMP_DECODER) += bmp.o
OBJS-$(CONFIG_BMP_ENCODER) += bmpenc.o
OBJS-$(CONFIG_C93_DECODER) += c93.o
OBJS-$(CONFIG_CAVS_DECODER) += cavs.o cavsdsp.o
OBJS-$(CONFIG_CINEPAK_DECODER) += cinepak.o
OBJS-$(CONFIG_CLJR_DECODER) += cljr.o
......
......@@ -59,6 +59,7 @@ void avcodec_register_all(void)
REGISTER_ENCDEC (ASV2, asv2);
REGISTER_DECODER(AVS, avs);
REGISTER_ENCDEC (BMP, bmp);
REGISTER_DECODER(C93, c93);
REGISTER_DECODER(CAVS, cavs);
REGISTER_DECODER(CINEPAK, cinepak);
REGISTER_DECODER(CLJR, cljr);
......
......@@ -160,6 +160,7 @@ enum CodecID {
CODEC_ID_DNXHD,
CODEC_ID_THP,
CODEC_ID_SGI,
CODEC_ID_C93,
/* various PCM "codecs" */
CODEC_ID_PCM_S16LE= 0x10000,
......@@ -2251,6 +2252,7 @@ extern AVCodec asv1_decoder;
extern AVCodec asv2_decoder;
extern AVCodec avs_decoder;
extern AVCodec bmp_decoder;
extern AVCodec c93_decoder;
extern AVCodec cavs_decoder;
extern AVCodec cinepak_decoder;
extern AVCodec cljr_decoder;
......
/*
* Interplay C93 video decoder
* Copyright (c) 2007 Anssi Hannula <anssi.hannula@gmail.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
*/
#include "avcodec.h"
#include "bytestream.h"
typedef struct {
AVFrame pictures[2];
int currentpic;
} C93DecoderContext;
typedef enum {
C93_8X8_FROM_PREV = 0x02,
C93_4X4_FROM_PREV = 0x06,
C93_4X4_FROM_CURR = 0x07,
C93_8X8_2COLOR = 0x08,
C93_4X4_2COLOR = 0x0A,
C93_4X4_4COLOR_GRP = 0x0B,
C93_4X4_4COLOR = 0x0D,
C93_NOOP = 0x0E,
C93_8X8_INTRA = 0x0F,
} C93BlockType;
#define WIDTH 320
#define HEIGHT 192
#define C93_HAS_PALETTE 0x01
#define C93_FIRST_FRAME 0x02
static int c93_decode_init(AVCodecContext *avctx)
{
avctx->pix_fmt = PIX_FMT_PAL8;
return 0;
}
static int c93_decode_end(AVCodecContext *avctx)
{
C93DecoderContext * const c93 = avctx->priv_data;
if (c93->pictures[0].data[0])
avctx->release_buffer(avctx, &c93->pictures[0]);
if (c93->pictures[1].data[0])
avctx->release_buffer(avctx, &c93->pictures[1]);
return 0;
}
static inline int c93_copy_block(AVCodecContext *avctx, uint8_t *to,
uint8_t *from, int offset, int height, int stride)
{
int i;
int width = height;
int from_x = offset % WIDTH;
int from_y = offset / WIDTH;
int overflow = from_x + width - WIDTH;
if (!from) {
/* silently ignoring predictive blocks in first frame */
return 0;
}
if (from_y + height > HEIGHT) {
av_log(avctx, AV_LOG_ERROR, "invalid offset %d during C93 decoding\n",
offset);
return -1;
}
if (overflow > 0) {
width -= overflow;
for (i = 0; i < height; i++) {
memcpy(&to[i*stride+width], &from[(from_y+i)*stride], overflow);
}
}
for (i = 0; i < height; i++) {
memcpy(&to[i*stride], &from[(from_y+i)*stride+from_x], width);
}
return 0;
}
static inline void c93_draw_n_color(uint8_t *out, int stride, int width,
int height, int bpp, uint8_t cols[4], uint8_t grps[4], uint32_t col)
{
int x, y;
for (y = 0; y < height; y++) {
if (grps)
cols[0] = grps[3 * (y >> 1)];
for (x = 0; x < width; x++) {
if (grps)
cols[1]= grps[(x >> 1) + 1];
out[x + y*stride] = cols[col & ((1 << bpp) - 1)];
col >>= bpp;
}
}
}
static int c93_decode_frame(AVCodecContext *avctx, void *data,
int *data_size, uint8_t * buf, int buf_size)
{
C93DecoderContext * const c93 = avctx->priv_data;
AVFrame * const newpic = &c93->pictures[c93->currentpic];
AVFrame * const oldpic = &c93->pictures[c93->currentpic^1];
AVFrame *picture = data;
uint8_t *out;
int stride, i, x, y;
C93BlockType bt = 0;
c93->currentpic ^= 1;
newpic->reference = 1;
newpic->buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE |
FF_BUFFER_HINTS_REUSABLE | FF_BUFFER_HINTS_READABLE;
if (avctx->reget_buffer(avctx, newpic)) {
av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
return -1;
}
stride = newpic->linesize[0];
if (buf[0] & C93_FIRST_FRAME) {
newpic->pict_type = FF_I_TYPE;
newpic->key_frame = 1;
} else {
newpic->pict_type = FF_P_TYPE;
newpic->key_frame = 0;
}
if (*buf++ & C93_HAS_PALETTE) {
uint32_t *palette = (uint32_t *) newpic->data[1];
uint8_t *palbuf = buf + buf_size - 768 - 1;
for (i = 0; i < 256; i++) {
palette[i] = bytestream_get_be24(&palbuf);
}
} else {
if (oldpic->data[1])
memcpy(newpic->data[1], oldpic->data[1], 256 * 4);
}
for (y = 0; y < HEIGHT; y += 8) {
out = newpic->data[0] + y * stride;
for (x = 0; x < WIDTH; x += 8) {
uint8_t *copy_from = oldpic->data[0];
unsigned int offset, j;
uint8_t cols[4], grps[4];
if (!bt)
bt = *buf++;
switch (bt & 0x0F) {
case C93_8X8_FROM_PREV:
offset = bytestream_get_le16(&buf);
if (c93_copy_block(avctx, out, copy_from, offset, 8, stride))
return -1;
break;
case C93_4X4_FROM_CURR:
copy_from = newpic->data[0];
case C93_4X4_FROM_PREV:
for (j = 0; j < 8; j += 4) {
for (i = 0; i < 8; i += 4) {
offset = bytestream_get_le16(&buf);
if (c93_copy_block(avctx, &out[j*stride+i],
copy_from, offset, 4, stride))
return -1;
}
}
break;
case C93_8X8_2COLOR:
bytestream_get_buffer(&buf, cols, 2);
for (i = 0; i < 8; i++) {
c93_draw_n_color(out + i*stride, stride, 8, 1, 1, cols,
NULL, *buf++);
}
break;
case C93_4X4_2COLOR:
case C93_4X4_4COLOR:
case C93_4X4_4COLOR_GRP:
for (j = 0; j < 8; j += 4) {
for (i = 0; i < 8; i += 4) {
if ((bt & 0x0F) == C93_4X4_2COLOR) {
bytestream_get_buffer(&buf, cols, 2);
c93_draw_n_color(out + i + j*stride, stride, 4, 4,
1, cols, NULL, bytestream_get_le16(&buf));
} else if ((bt & 0x0F) == C93_4X4_4COLOR) {
bytestream_get_buffer(&buf, cols, 4);
c93_draw_n_color(out + i + j*stride, stride, 4, 4,
2, cols, NULL, bytestream_get_le32(&buf));
} else {
bytestream_get_buffer(&buf, grps, 4);
c93_draw_n_color(out + i + j*stride, stride, 4, 4,
1, cols, grps, bytestream_get_le16(&buf));
}
}
}
break;
case C93_NOOP:
break;
case C93_8X8_INTRA:
for (j = 0; j < 8; j++)
bytestream_get_buffer(&buf, out + j*stride, 8);
break;
default:
av_log(avctx, AV_LOG_ERROR, "unexpected type %x at %dx%d\n",
bt & 0x0F, x, y);
return -1;
}
bt >>= 4;
out += 8;
}
}
*picture = *newpic;
*data_size = sizeof(AVFrame);
return buf_size;
}
AVCodec c93_decoder = {
"c93",
CODEC_TYPE_VIDEO,
CODEC_ID_C93,
sizeof(C93DecoderContext),
c93_decode_init,
NULL,
c93_decode_end,
c93_decode_frame,
CODEC_CAP_DR1,
};
......@@ -28,6 +28,7 @@ OBJS-$(CONFIG_AVI_DEMUXER) += avidec.o riff.o
OBJS-$(CONFIG_AVI_MUXER) += avienc.o riff.o
OBJS-$(CONFIG_AVISYNTH) += avisynth.o
OBJS-$(CONFIG_AVS_DEMUXER) += avs.o vocdec.o voc.o riff.o
OBJS-$(CONFIG_C93_DEMUXER) += c93.o
OBJS-$(CONFIG_CRC_MUXER) += crc.o
OBJS-$(CONFIG_FRAMECRC_MUXER) += crc.o
OBJS-$(CONFIG_DAUD_DEMUXER) += daud.o
......
......@@ -58,6 +58,7 @@ void av_register_all(void)
av_register_input_format(&avisynth_demuxer);
#endif
REGISTER_DEMUXER (AVS, avs);
REGISTER_DEMUXER (C93, c93);
REGISTER_MUXER (CRC, crc);
REGISTER_DEMUXER (DAUD, daud);
REGISTER_DEMUXER (DC1394, dc1394);
......
......@@ -32,6 +32,7 @@ extern AVInputFormat audio_demuxer;
extern AVInputFormat avi_demuxer;
extern AVInputFormat avisynth_demuxer;
extern AVInputFormat avs_demuxer;
extern AVInputFormat c93_demuxer;
extern AVInputFormat daud_demuxer;
extern AVInputFormat dc1394_demuxer;
extern AVInputFormat dsicin_demuxer;
......
/*
* Interplay C93 demuxer
* Copyright (c) 2007 Anssi Hannula <anssi.hannula@gmail.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
*/
#include "avformat.h"
#include "voc.h"
typedef struct {
uint16_t index;
uint8_t length;
uint8_t frames;
} C93BlockRecord;
typedef struct {
voc_dec_context_t voc;
C93BlockRecord block_records[512];
int current_block;
uint32_t frame_offsets[32];
int current_frame;
int next_pkt_is_audio;
AVStream *audio;
} C93DemuxContext;
static int c93_probe(AVProbeData *p)
{
if (p->buf_size < 13)
return 0;
if (p->buf[0] == 0x01 && p->buf[1] == 0x00 &&
p->buf[4] == 0x01 + p->buf[2] &&
p->buf[8] == p->buf[4] + p->buf[6] &&
p->buf[12] == p->buf[8] + p->buf[10])
return AVPROBE_SCORE_MAX;
return 0;
}
static int c93_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
AVStream *video;
ByteIOContext *pb = &s->pb;
C93DemuxContext *c93 = s->priv_data;
int i;
int framecount = 0;
for (i = 0; i < 512; i++) {
c93->block_records[i].index = get_le16(pb);
c93->block_records[i].length = get_byte(pb);
c93->block_records[i].frames = get_byte(pb);
if (c93->block_records[i].frames > 32) {
av_log(s, AV_LOG_ERROR, "too many frames in block\n");
return AVERROR_INVALIDDATA;
}
framecount += c93->block_records[i].frames;
}
/* Audio streams are added if audio packets are found */
s->ctx_flags |= AVFMTCTX_NOHEADER;
video = av_new_stream(s, 0);
if (!video)
return AVERROR_NOMEM;
video->codec->codec_type = CODEC_TYPE_VIDEO;
video->codec->codec_id = CODEC_ID_C93;
video->codec->width = 320;
video->codec->height = 192;
/* 4:3 320x200 with 8 empty lines */
video->codec->sample_aspect_ratio = (AVRational) { 5, 6 };
video->time_base = (AVRational) { 2, 25 };
video->nb_frames = framecount;
video->duration = framecount;
video->start_time = 0;
c93->current_block = 0;
c93->current_frame = 0;
c93->next_pkt_is_audio = 0;
return 0;
}
#define C93_HAS_PALETTE 0x01
#define C93_FIRST_FRAME 0x02
static int c93_read_packet(AVFormatContext *s, AVPacket *pkt)
{
ByteIOContext *pb = &s->pb;
C93DemuxContext *c93 = s->priv_data;
C93BlockRecord *br = &c93->block_records[c93->current_block];
int datasize;
int ret, i;
if (c93->next_pkt_is_audio) {
c93->current_frame++;
c93->next_pkt_is_audio = 0;
datasize = get_le16(pb);
if (datasize > 42) {
if (!c93->audio) {
c93->audio = av_new_stream(s, 1);
if (!c93->audio)
return AVERROR_NOMEM;
c93->audio->codec->codec_type = CODEC_TYPE_AUDIO;
}
url_fskip(pb, 26); /* VOC header */
ret = voc_get_packet(s, pkt, c93->audio, datasize - 26);
if (ret > 0) {
pkt->stream_index = 1;
pkt->flags |= PKT_FLAG_KEY;
return ret;
}
}
}
if (c93->current_frame >= br->frames) {
if (c93->current_block >= 511 || !br[1].length)
return AVERROR_IO;
br++;
c93->current_block++;
c93->current_frame = 0;
}
if (c93->current_frame == 0) {
url_fseek(pb, br->index * 2048, SEEK_SET);
for (i = 0; i < 32; i++) {
c93->frame_offsets[i] = get_le32(pb);
}
}
url_fseek(pb,br->index * 2048 +
c93->frame_offsets[c93->current_frame], SEEK_SET);
datasize = get_le16(pb); /* video frame size */
ret = av_new_packet(pkt, datasize + 768 + 1);
if (ret < 0)
return ret;
pkt->data[0] = 0;
pkt->size = datasize + 1;
ret = get_buffer(pb, pkt->data + 1, datasize);
if (ret < datasize) {
ret = AVERROR_IO;
goto fail;
}
datasize = get_le16(pb); /* palette size */
if (datasize) {
if (datasize != 768) {
av_log(s, AV_LOG_ERROR, "invalid palette size %u\n", datasize);
ret = AVERROR_INVALIDDATA;
goto fail;
}
pkt->data[0] |= C93_HAS_PALETTE;
ret = get_buffer(pb, pkt->data + pkt->size, datasize);
if (ret < datasize) {
ret = AVERROR_IO;
goto fail;
}
pkt->size += 768;
}
pkt->stream_index = 0;
c93->next_pkt_is_audio = 1;
/* only the first frame is guaranteed to not reference previous frames */
if (c93->current_block == 0 && c93->current_frame == 0) {
pkt->flags |= PKT_FLAG_KEY;
pkt->data[0] |= C93_FIRST_FRAME;
}
return 0;
fail:
av_free_packet(pkt);
return ret;
}
AVInputFormat c93_demuxer = {
"c93",
"Interplay C93",
sizeof(C93DemuxContext),
c93_probe,
c93_read_header,
c93_read_packet,
};
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