| /* |
| * 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, |
| }; |