/* * Wing Commander III Movie (.mve) File Demuxer * Copyright (c) 2003 The ffmpeg Project * * 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 libavformat/wc3movie.c * Wing Commander III Movie file demuxer * by Mike Melanson (melanson@pcisys.net) * for more information on the WC3 .mve file format, visit: * http://www.pcisys.net/~melanson/codecs/ */ #include "libavutil/intreadwrite.h" #include "avformat.h" #define WC3_PREAMBLE_SIZE 8 #define FORM_TAG MKTAG('F', 'O', 'R', 'M') #define MOVE_TAG MKTAG('M', 'O', 'V', 'E') #define PC__TAG MKTAG('_', 'P', 'C', '_') #define SOND_TAG MKTAG('S', 'O', 'N', 'D') #define BNAM_TAG MKTAG('B', 'N', 'A', 'M') #define SIZE_TAG MKTAG('S', 'I', 'Z', 'E') #define PALT_TAG MKTAG('P', 'A', 'L', 'T') #define INDX_TAG MKTAG('I', 'N', 'D', 'X') #define BRCH_TAG MKTAG('B', 'R', 'C', 'H') #define SHOT_TAG MKTAG('S', 'H', 'O', 'T') #define VGA__TAG MKTAG('V', 'G', 'A', ' ') #define TEXT_TAG MKTAG('T', 'E', 'X', 'T') #define AUDI_TAG MKTAG('A', 'U', 'D', 'I') /* video resolution unless otherwise specified */ #define WC3_DEFAULT_WIDTH 320 #define WC3_DEFAULT_HEIGHT 165 /* always use the same PCM audio parameters */ #define WC3_SAMPLE_RATE 22050 #define WC3_AUDIO_CHANNELS 1 #define WC3_AUDIO_BITS 16 /* nice, constant framerate */ #define WC3_FRAME_FPS 15 #define PALETTE_SIZE (256 * 3) #define PALETTE_COUNT 256 typedef struct Wc3DemuxContext { int width; int height; unsigned char *palettes; int palette_count; int64_t pts; int video_stream_index; int audio_stream_index; AVPaletteControl palette_control; } Wc3DemuxContext; /* bizarre palette lookup table */ static const unsigned char wc3_pal_lookup[] = { 0x00, 0x03, 0x05, 0x07, 0x09, 0x0B, 0x0D, 0x0E, 0x10, 0x12, 0x13, 0x15, 0x16, 0x18, 0x19, 0x1A, 0x1C, 0x1D, 0x1F, 0x20, 0x21, 0x23, 0x24, 0x25, 0x27, 0x28, 0x29, 0x2A, 0x2C, 0x2D, 0x2E, 0x2F, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3F, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53, 0x54, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F, 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7D, 0x7E, 0x7F, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8D, 0x8E, 0x8F, 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, 0xA0, 0xA1, 0xA2, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0xDF, 0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xED, 0xEE, 0xEF, 0xF0, 0xF1, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFA, 0xFB, 0xFC, 0xFD, 0xFD, 0xFD, 0xFD }; static int wc3_probe(AVProbeData *p) { if (p->buf_size < 12) return 0; if ((AV_RL32(&p->buf[0]) != FORM_TAG) || (AV_RL32(&p->buf[8]) != MOVE_TAG)) return 0; return AVPROBE_SCORE_MAX; } static int wc3_read_header(AVFormatContext *s, AVFormatParameters *ap) { Wc3DemuxContext *wc3 = s->priv_data; ByteIOContext *pb = s->pb; unsigned int fourcc_tag; unsigned int size; AVStream *st; unsigned char preamble[WC3_PREAMBLE_SIZE]; char buffer[513]; int ret = 0; int current_palette = 0; int bytes_to_read; int i; unsigned char rotate; /* default context members */ wc3->width = WC3_DEFAULT_WIDTH; wc3->height = WC3_DEFAULT_HEIGHT; wc3->palettes = NULL; wc3->palette_count = 0; wc3->pts = 0; wc3->video_stream_index = wc3->audio_stream_index = 0; /* skip the first 3 32-bit numbers */ url_fseek(pb, 12, SEEK_CUR); /* traverse through the chunks and load the header information before * the first BRCH tag */ if ((ret = get_buffer(pb, preamble, WC3_PREAMBLE_SIZE)) != WC3_PREAMBLE_SIZE) return AVERROR(EIO); fourcc_tag = AV_RL32(&preamble[0]); size = (AV_RB32(&preamble[4]) + 1) & (~1); do { switch (fourcc_tag) { case SOND_TAG: case INDX_TAG: /* SOND unknown, INDX unnecessary; ignore both */ url_fseek(pb, size, SEEK_CUR); break; case PC__TAG: /* need the number of palettes */ url_fseek(pb, 8, SEEK_CUR); if ((ret = get_buffer(pb, preamble, 4)) != 4) return AVERROR(EIO); wc3->palette_count = AV_RL32(&preamble[0]); if((unsigned)wc3->palette_count >= UINT_MAX / PALETTE_SIZE){ wc3->palette_count= 0; return -1; } wc3->palettes = av_malloc(wc3->palette_count * PALETTE_SIZE); break; case BNAM_TAG: /* load up the name */ if ((unsigned)size < 512) bytes_to_read = size; else bytes_to_read = 512; if ((ret = get_buffer(pb, buffer, bytes_to_read)) != bytes_to_read) return AVERROR(EIO); buffer[bytes_to_read] = 0; av_metadata_set(&s->metadata, "title", buffer); break; case SIZE_TAG: /* video resolution override */ if ((ret = get_buffer(pb, preamble, WC3_PREAMBLE_SIZE)) != WC3_PREAMBLE_SIZE) return AVERROR(EIO); wc3->width = AV_RL32(&preamble[0]); wc3->height = AV_RL32(&preamble[4]); break; case PALT_TAG: /* one of several palettes */ if ((unsigned)current_palette >= wc3->palette_count) return AVERROR_INVALIDDATA; if ((ret = get_buffer(pb, &wc3->palettes[current_palette * PALETTE_SIZE], PALETTE_SIZE)) != PALETTE_SIZE) return AVERROR(EIO); /* transform the current palette in place */ for (i = current_palette * PALETTE_SIZE; i < (current_palette + 1) * PALETTE_SIZE; i++) { /* rotate each palette component left by 2 and use the result * as an index into the color component table */ rotate = ((wc3->palettes[i] << 2) & 0xFF) | ((wc3->palettes[i] >> 6) & 0xFF); wc3->palettes[i] = wc3_pal_lookup[rotate]; } current_palette++; break; default: av_log(s, AV_LOG_ERROR, " unrecognized WC3 chunk: %c%c%c%c (0x%02X%02X%02X%02X)\n", preamble[0], preamble[1], preamble[2], preamble[3], preamble[0], preamble[1], preamble[2], preamble[3]); return AVERROR_INVALIDDATA; break; } if ((ret = get_buffer(pb, preamble, WC3_PREAMBLE_SIZE)) != WC3_PREAMBLE_SIZE) return AVERROR(EIO); fourcc_tag = AV_RL32(&preamble[0]); /* chunk sizes are 16-bit aligned */ size = (AV_RB32(&preamble[4]) + 1) & (~1); } while (fourcc_tag != BRCH_TAG); /* initialize the decoder streams */ st = av_new_stream(s, 0); if (!st) return AVERROR(ENOMEM); av_set_pts_info(st, 33, 1, WC3_FRAME_FPS); wc3->video_stream_index = st->index; st->codec->codec_type = CODEC_TYPE_VIDEO; st->codec->codec_id = CODEC_ID_XAN_WC3; st->codec->codec_tag = 0; /* no fourcc */ st->codec->width = wc3->width; st->codec->height = wc3->height; /* palette considerations */ st->codec->palctrl = &wc3->palette_control; st = av_new_stream(s, 0); if (!st) return AVERROR(ENOMEM); av_set_pts_info(st, 33, 1, WC3_FRAME_FPS); wc3->audio_stream_index = st->index; st->codec->codec_type = CODEC_TYPE_AUDIO; st->codec->codec_id = CODEC_ID_PCM_S16LE; st->codec->codec_tag = 1; st->codec->channels = WC3_AUDIO_CHANNELS; st->codec->bits_per_coded_sample = WC3_AUDIO_BITS; st->codec->sample_rate = WC3_SAMPLE_RATE; st->codec->bit_rate = st->codec->channels * st->codec->sample_rate * st->codec->bits_per_coded_sample; st->codec->block_align = WC3_AUDIO_BITS * WC3_AUDIO_CHANNELS; return 0; } static int wc3_read_packet(AVFormatContext *s, AVPacket *pkt) { Wc3DemuxContext *wc3 = s->priv_data; ByteIOContext *pb = s->pb; unsigned int fourcc_tag; unsigned int size; int packet_read = 0; int ret = 0; unsigned char preamble[WC3_PREAMBLE_SIZE]; unsigned char text[1024]; unsigned int palette_number; int i; unsigned char r, g, b; int base_palette_index; while (!packet_read) { /* get the next chunk preamble */ if ((ret = get_buffer(pb, preamble, WC3_PREAMBLE_SIZE)) != WC3_PREAMBLE_SIZE) ret = AVERROR(EIO); fourcc_tag = AV_RL32(&preamble[0]); /* chunk sizes are 16-bit aligned */ size = (AV_RB32(&preamble[4]) + 1) & (~1); switch (fourcc_tag) { case BRCH_TAG: /* no-op */ break; case SHOT_TAG: /* load up new palette */ if ((ret = get_buffer(pb, preamble, 4)) != 4) return AVERROR(EIO); palette_number = AV_RL32(&preamble[0]); if (palette_number >= wc3->palette_count) return AVERROR_INVALIDDATA; base_palette_index = palette_number * PALETTE_COUNT * 3; for (i = 0; i < PALETTE_COUNT; i++) { r = wc3->palettes[base_palette_index + i * 3 + 0]; g = wc3->palettes[base_palette_index + i * 3 + 1]; b = wc3->palettes[base_palette_index + i * 3 + 2]; wc3->palette_control.palette[i] = (r << 16) | (g << 8) | (b); } wc3->palette_control.palette_changed = 1; break; case VGA__TAG: /* send out video chunk */ ret= av_get_packet(pb, pkt, size); pkt->stream_index = wc3->video_stream_index; pkt->pts = wc3->pts; if (ret != size) ret = AVERROR(EIO); packet_read = 1; break; case TEXT_TAG: /* subtitle chunk */ #if 0 url_fseek(pb, size, SEEK_CUR); #else if ((unsigned)size > sizeof(text) || (ret = get_buffer(pb, text, size)) != size) ret = AVERROR(EIO); else { int i = 0; av_log (s, AV_LOG_DEBUG, "Subtitle time!\n"); av_log (s, AV_LOG_DEBUG, " inglish: %s\n", &text[i + 1]); i += text[i] + 1; av_log (s, AV_LOG_DEBUG, " doytsch: %s\n", &text[i + 1]); i += text[i] + 1; av_log (s, AV_LOG_DEBUG, " fronsay: %s\n", &text[i + 1]); } #endif break; case AUDI_TAG: /* send out audio chunk */ ret= av_get_packet(pb, pkt, size); pkt->stream_index = wc3->audio_stream_index; pkt->pts = wc3->pts; if (ret != size) ret = AVERROR(EIO); /* time to advance pts */ wc3->pts++; packet_read = 1; break; default: av_log (s, AV_LOG_ERROR, " unrecognized WC3 chunk: %c%c%c%c (0x%02X%02X%02X%02X)\n", preamble[0], preamble[1], preamble[2], preamble[3], preamble[0], preamble[1], preamble[2], preamble[3]); ret = AVERROR_INVALIDDATA; packet_read = 1; break; } } return ret; } static int wc3_read_close(AVFormatContext *s) { Wc3DemuxContext *wc3 = s->priv_data; av_free(wc3->palettes); return 0; } AVInputFormat wc3_demuxer = { "wc3movie", NULL_IF_CONFIG_SMALL("Wing Commander III movie format"), sizeof(Wc3DemuxContext), wc3_probe, wc3_read_header, wc3_read_packet, wc3_read_close, };