From 9a0ddd09e737545711e209591bc95891e3615543 Mon Sep 17 00:00:00 2001 From: Anssi Hannula Date: Sat, 7 Apr 2007 14:25:25 +0000 Subject: [PATCH] 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 --- Changelog | 1 + doc/ffmpeg-doc.texi | 3 + libavcodec/Makefile | 1 + libavcodec/allcodecs.c | 1 + libavcodec/avcodec.h | 2 + libavcodec/c93.c | 253 +++++++++++++++++++++++++++++++++++++++ libavformat/Makefile | 1 + libavformat/allformats.c | 1 + libavformat/allformats.h | 1 + libavformat/c93.c | 202 +++++++++++++++++++++++++++++++ 10 files changed, 466 insertions(+) create mode 100644 libavcodec/c93.c create mode 100644 libavformat/c93.c diff --git a/Changelog b/Changelog index d316308459..347acdcdc6 100644 --- a/Changelog +++ b/Changelog @@ -77,6 +77,7 @@ version - DNxHD decoder - Gamecube movie (.THP) playback system - Blackfin optimizations +- Interplay C93 demuxer and video decoder version 0.4.9-pre1: diff --git a/doc/ffmpeg-doc.texi b/doc/ffmpeg-doc.texi index 796ab0cf6a..54af81db2d 100644 --- a/doc/ffmpeg-doc.texi +++ b/doc/ffmpeg-doc.texi @@ -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. diff --git a/libavcodec/Makefile b/libavcodec/Makefile index 0036eda6b0..19886b8e7d 100644 --- a/libavcodec/Makefile +++ b/libavcodec/Makefile @@ -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 diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c index 59b51716ce..09612b40d2 100644 --- a/libavcodec/allcodecs.c +++ b/libavcodec/allcodecs.c @@ -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); diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h index 1b5fec98d8..b7ed16248d 100644 --- a/libavcodec/avcodec.h +++ b/libavcodec/avcodec.h @@ -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; diff --git a/libavcodec/c93.c b/libavcodec/c93.c new file mode 100644 index 0000000000..1e90efbc2a --- /dev/null +++ b/libavcodec/c93.c @@ -0,0 +1,253 @@ +/* + * Interplay C93 video decoder + * Copyright (c) 2007 Anssi Hannula + * + * 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, +}; diff --git a/libavformat/Makefile b/libavformat/Makefile index 01e68a9e0c..4e18f72657 100644 --- a/libavformat/Makefile +++ b/libavformat/Makefile @@ -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 diff --git a/libavformat/allformats.c b/libavformat/allformats.c index 09e3f0d756..3cfe872661 100644 --- a/libavformat/allformats.c +++ b/libavformat/allformats.c @@ -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); diff --git a/libavformat/allformats.h b/libavformat/allformats.h index 8b36c98c5f..3e0cb6b980 100644 --- a/libavformat/allformats.h +++ b/libavformat/allformats.h @@ -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; diff --git a/libavformat/c93.c b/libavformat/c93.c new file mode 100644 index 0000000000..86f1253985 --- /dev/null +++ b/libavformat/c93.c @@ -0,0 +1,202 @@ +/* + * Interplay C93 demuxer + * Copyright (c) 2007 Anssi Hannula + * + * 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, +};