diff ffmpeg/libavformat/wc3movie.c @ 11:f445c3017523

new files

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ffmpeg/libavformat/wc3movie.c	Sun Apr 21 11:16:23 2013 +0200
@@ -0,0 +1,304 @@
+/*
+ * 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
+ * Wing Commander III Movie file demuxer
+ * by Mike Melanson ([e-mail])
+ * for more information on the WC3 .mve file format, visit:
+ *   http://www.pcisys.net/~melanson/codecs/
+ */
+
+#include "libavutil/channel_layout.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/dict.h"
+#include "avformat.h"
+#include "internal.h"
+
+#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)
+
+typedef struct Wc3DemuxContext {
+    int width;
+    int height;
+    int64_t pts;
+    int video_stream_index;
+    int audio_stream_index;
+
+    AVPacket vpkt;
+
+} Wc3DemuxContext;
+
+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)
+{
+    Wc3DemuxContext *wc3 = s->priv_data;
+    AVIOContext *pb = s->pb;
+    unsigned int fourcc_tag;
+    unsigned int size;
+    AVStream *st;
+    int ret = 0;
+    char *buffer;
+
+    /* default context members */
+    wc3->width = WC3_DEFAULT_WIDTH;
+    wc3->height = WC3_DEFAULT_HEIGHT;
+    wc3->pts = 0;
+    wc3->video_stream_index = wc3->audio_stream_index = 0;
+    av_init_packet(&wc3->vpkt);
+    wc3->vpkt.data = NULL; wc3->vpkt.size = 0;
+
+    /* skip the first 3 32-bit numbers */
+    avio_skip(pb, 12);
+
+    /* traverse through the chunks and load the header information before
+     * the first BRCH tag */
+    fourcc_tag = avio_rl32(pb);
+    size = (avio_rb32(pb) + 1) & (~1);
+
+    do {
+        switch (fourcc_tag) {
+
+        case SOND_TAG:
+        case INDX_TAG:
+            /* SOND unknown, INDX unnecessary; ignore both */
+            avio_skip(pb, size);
+            break;
+
+        case PC__TAG:
+            /* number of palettes, unneeded */
+            avio_skip(pb, 12);
+            break;
+
+        case BNAM_TAG:
+            /* load up the name */
+            buffer = av_malloc(size+1);
+            if (!buffer)
+                return AVERROR(ENOMEM);
+            if ((ret = avio_read(pb, buffer, size)) != size)
+                return AVERROR(EIO);
+            buffer[size] = 0;
+            av_dict_set(&s->metadata, "title", buffer,
+                                   AV_DICT_DONT_STRDUP_VAL);
+            break;
+
+        case SIZE_TAG:
+            /* video resolution override */
+            wc3->width  = avio_rl32(pb);
+            wc3->height = avio_rl32(pb);
+            break;
+
+        case PALT_TAG:
+            /* one of several palettes */
+            avio_seek(pb, -8, SEEK_CUR);
+            av_append_packet(pb, &wc3->vpkt, 8 + PALETTE_SIZE);
+            break;
+
+        default:
+            av_log(s, AV_LOG_ERROR, "  unrecognized WC3 chunk: %c%c%c%c (0x%02X%02X%02X%02X)\n",
+                (uint8_t)fourcc_tag, (uint8_t)(fourcc_tag >> 8), (uint8_t)(fourcc_tag >> 16), (uint8_t)(fourcc_tag >> 24),
+                (uint8_t)fourcc_tag, (uint8_t)(fourcc_tag >> 8), (uint8_t)(fourcc_tag >> 16), (uint8_t)(fourcc_tag >> 24));
+            return AVERROR_INVALIDDATA;
+        }
+
+        fourcc_tag = avio_rl32(pb);
+        /* chunk sizes are 16-bit aligned */
+        size = (avio_rb32(pb) + 1) & (~1);
+        if (url_feof(pb))
+            return AVERROR(EIO);
+
+    } while (fourcc_tag != BRCH_TAG);
+
+    /* initialize the decoder streams */
+    st = avformat_new_stream(s, NULL);
+    if (!st)
+        return AVERROR(ENOMEM);
+    avpriv_set_pts_info(st, 33, 1, WC3_FRAME_FPS);
+    wc3->video_stream_index = st->index;
+    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+    st->codec->codec_id = AV_CODEC_ID_XAN_WC3;
+    st->codec->codec_tag = 0;  /* no fourcc */
+    st->codec->width = wc3->width;
+    st->codec->height = wc3->height;
+
+    st = avformat_new_stream(s, NULL);
+    if (!st)
+        return AVERROR(ENOMEM);
+    avpriv_set_pts_info(st, 33, 1, WC3_FRAME_FPS);
+    wc3->audio_stream_index = st->index;
+    st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+    st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
+    st->codec->codec_tag = 1;
+    st->codec->channels = WC3_AUDIO_CHANNELS;
+    st->codec->channel_layout = AV_CH_LAYOUT_MONO;
+    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;
+    AVIOContext *pb = s->pb;
+    unsigned int fourcc_tag;
+    unsigned int size;
+    int packet_read = 0;
+    int ret = 0;
+    unsigned char text[1024];
+
+    while (!packet_read) {
+
+        fourcc_tag = avio_rl32(pb);
+        /* chunk sizes are 16-bit aligned */
+        size = (avio_rb32(pb) + 1) & (~1);
+        if (url_feof(pb))
+            return AVERROR(EIO);
+
+        switch (fourcc_tag) {
+
+        case BRCH_TAG:
+            /* no-op */
+            break;
+
+        case SHOT_TAG:
+            /* load up new palette */
+            avio_seek(pb, -8, SEEK_CUR);
+            av_append_packet(pb, &wc3->vpkt, 8 + 4);
+            break;
+
+        case VGA__TAG:
+            /* send out video chunk */
+            avio_seek(pb, -8, SEEK_CUR);
+            ret= av_append_packet(pb, &wc3->vpkt, 8 + size);
+            // ignore error if we have some data
+            if (wc3->vpkt.size > 0)
+                ret = 0;
+            *pkt = wc3->vpkt;
+            wc3->vpkt.data = NULL; wc3->vpkt.size = 0;
+            pkt->stream_index = wc3->video_stream_index;
+            pkt->pts = wc3->pts;
+            packet_read = 1;
+            break;
+
+        case TEXT_TAG:
+            /* subtitle chunk */
+#if 0
+            avio_skip(pb, size);
+#else
+            if ((unsigned)size > sizeof(text) || (ret = avio_read(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;
+
+            /* 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",
+                (uint8_t)fourcc_tag, (uint8_t)(fourcc_tag >> 8), (uint8_t)(fourcc_tag >> 16), (uint8_t)(fourcc_tag >> 24),
+                (uint8_t)fourcc_tag, (uint8_t)(fourcc_tag >> 8), (uint8_t)(fourcc_tag >> 16), (uint8_t)(fourcc_tag >> 24));
+            ret = AVERROR_INVALIDDATA;
+            packet_read = 1;
+            break;
+        }
+    }
+
+    return ret;
+}
+
+static int wc3_read_close(AVFormatContext *s)
+{
+    Wc3DemuxContext *wc3 = s->priv_data;
+
+    if (wc3->vpkt.size > 0)
+        av_free_packet(&wc3->vpkt);
+
+    return 0;
+}
+
+AVInputFormat ff_wc3_demuxer = {
+    .name           = "wc3movie",
+    .long_name      = NULL_IF_CONFIG_SMALL("Wing Commander III movie"),
+    .priv_data_size = sizeof(Wc3DemuxContext),
+    .read_probe     = wc3_probe,
+    .read_header    = wc3_read_header,
+    .read_packet    = wc3_read_packet,
+    .read_close     = wc3_read_close,
+};