New demuxers: Sega FILM/CPK, Westwood VQA & AUD; new decoders: MS RLE &

Video-1, Apple RPZA, Cinepak, Westwood IMA ADPCM

Originally committed as revision 2324 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 323 insertions, 0 deletions

diff --git a/libavformat/segafilm.c b/libavformat/segafilm.c
new file mode 100644
index 0000000000..818c0d3d82
--- /dev/null
+++ b/libavformat/segafilm.c
@@ -0,0 +1,323 @@
+/*
+ * Sega FILM Format (CPK) Demuxer
+ * Copyright (c) 2003 The ffmpeg Project
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+/**
+ * @file segafilm.c
+ * Sega FILM (.cpk) file demuxer
+ * by Mike Melanson (melanson@pcisys.net)
+ * For more information regarding the Sega FILM file format, visit:
+ *   http://www.pcisys.net/~melanson/codecs/
+ */
+
+#include "avformat.h"
+
+#define BE_16(x)  ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
+#define BE_32(x)  ((((uint8_t*)(x))[0] << 24) | \
+                   (((uint8_t*)(x))[1] << 16) | \
+                   (((uint8_t*)(x))[2] << 8) | \
+                    ((uint8_t*)(x))[3])
+
+#define FOURCC_TAG( ch0, ch1, ch2, ch3 ) \
+        ( (long)(unsigned char)(ch3) | \
+        ( (long)(unsigned char)(ch2) << 8 ) | \
+        ( (long)(unsigned char)(ch1) << 16 ) | \
+        ( (long)(unsigned char)(ch0) << 24 ) )
+
+#define FILM_TAG FOURCC_TAG('F', 'I', 'L', 'M')
+#define FDSC_TAG FOURCC_TAG('F', 'D', 'S', 'C')
+#define STAB_TAG FOURCC_TAG('S', 'T', 'A', 'B')
+#define CVID_TAG FOURCC_TAG('c', 'v', 'i', 'd')
+
+typedef struct {
+  int stream;
+  off_t sample_offset;
+  unsigned int sample_size;
+  int64_t pts;
+  int keyframe;
+} film_sample_t;
+
+typedef struct FilmDemuxContext {
+    int video_stream_index;
+    int audio_stream_index;
+
+    unsigned int audio_type;
+    unsigned int audio_samplerate;
+    unsigned int audio_bits;
+    unsigned int audio_channels;
+
+    unsigned int video_type;
+    unsigned int sample_count;
+    film_sample_t *sample_table;
+    unsigned int current_sample;
+
+    unsigned int base_clock;
+    unsigned int version;
+    int cvid_extra_bytes;  /* the number of bytes thrown into the Cinepak
+                            * chunk header to throw off decoders */
+
+    /* buffer used for interleaving stereo PCM data */
+    unsigned char *stereo_buffer;
+    int stereo_buffer_size;
+} FilmDemuxContext;
+
+static int film_probe(AVProbeData *p)
+{
+    if (p->buf_size < 4)
+        return 0;
+
+    if (BE_32(&p->buf[0]) != FILM_TAG)
+        return 0;
+
+    return AVPROBE_SCORE_MAX;
+}
+
+static int film_read_header(AVFormatContext *s,
+                            AVFormatParameters *ap)
+{
+    FilmDemuxContext *film = (FilmDemuxContext *)s->priv_data;
+    ByteIOContext *pb = &s->pb;
+    AVStream *st;
+    unsigned char scratch[256];
+    int i;
+    unsigned int data_offset;
+    unsigned int audio_frame_counter;
+
+    film->sample_table = NULL;
+    film->stereo_buffer = NULL;
+    film->stereo_buffer_size = 0;
+
+    /* load the main FILM header */
+    if (get_buffer(pb, scratch, 16) != 16)
+        return -EIO;
+    data_offset = BE_32(&scratch[4]);
+    film->version = BE_32(&scratch[8]);
+
+    /* load the FDSC chunk */
+    if (film->version == 0) {
+        /* special case for Lemmings .film files; 20-byte header */
+        if (get_buffer(pb, scratch, 20) != 20)
+            return -EIO;
+        /* make some assumptions about the audio parameters */
+        film->audio_type = CODEC_ID_PCM_S8;
+        film->audio_samplerate = 22050;
+        film->audio_channels = 1;
+        film->audio_bits = 8;
+    } else {
+        /* normal Saturn .cpk files; 32-byte header */
+        if (get_buffer(pb, scratch, 32) != 32)
+            return -EIO;
+        film->audio_samplerate = BE_16(&scratch[24]);;
+        film->audio_channels = scratch[21];
+        film->audio_bits = scratch[22];
+        if (film->audio_bits == 8)
+            film->audio_type = CODEC_ID_PCM_S8;
+        else if (film->audio_bits == 16)
+            film->audio_type = CODEC_ID_PCM_S16BE;
+        else
+            film->audio_type = 0;
+    }
+
+    if (BE_32(&scratch[0]) != FDSC_TAG)
+        return AVERROR_INVALIDDATA;
+
+    film->cvid_extra_bytes = 0;
+    if (BE_32(&scratch[8]) == CVID_TAG) {
+        film->video_type = CODEC_ID_CINEPAK;
+        if (film->version)
+            film->cvid_extra_bytes = 2;
+        else
+            film->cvid_extra_bytes = 6;  /* Lemmings 3DO case */
+    } else
+        film->video_type = 0;
+
+    /* initialize the decoder streams */
+    if (film->video_type) {
+        st = av_new_stream(s, 0);
+        if (!st)
+            return AVERROR_NOMEM;
+        film->video_stream_index = st->index;
+        st->codec.codec_type = CODEC_TYPE_VIDEO;
+        st->codec.codec_id = film->video_type;
+        st->codec.codec_tag = 0;  /* no fourcc */
+        st->codec.width = BE_32(&scratch[16]);
+        st->codec.height = BE_32(&scratch[12]);
+    }
+
+    if (film->audio_type) {
+        st = av_new_stream(s, 0);
+        if (!st)
+            return AVERROR_NOMEM;
+        film->audio_stream_index = st->index;
+        st->codec.codec_type = CODEC_TYPE_AUDIO;
+        st->codec.codec_id = film->audio_type;
+        st->codec.codec_tag = 1;
+        st->codec.channels = film->audio_channels;
+        st->codec.bits_per_sample = film->audio_bits;
+        st->codec.sample_rate = film->audio_samplerate;
+        st->codec.bit_rate = st->codec.channels * st->codec.sample_rate *
+            st->codec.bits_per_sample;
+        st->codec.block_align = st->codec.channels * 
+            st->codec.bits_per_sample / 8;
+    }
+
+    /* load the sample table */
+    if (get_buffer(pb, scratch, 16) != 16)
+        return -EIO;
+    if (BE_32(&scratch[0]) != STAB_TAG)
+        return AVERROR_INVALIDDATA;
+    film->base_clock = BE_32(&scratch[8]);
+    film->sample_count = BE_32(&scratch[12]);
+    film->sample_table = av_malloc(film->sample_count * sizeof(film_sample_t));
+    
+    audio_frame_counter = 0;
+    for (i = 0; i < film->sample_count; i++) {
+        /* load the next sample record and transfer it to an internal struct */
+        if (get_buffer(pb, scratch, 16) != 16) {
+            av_free(film->sample_table);
+            return -EIO;
+        }
+        film->sample_table[i].sample_offset = 
+            data_offset + BE_32(&scratch[0]);
+        film->sample_table[i].sample_size = BE_32(&scratch[4]);
+        if (BE_32(&scratch[8]) == 0xFFFFFFFF) {
+            film->sample_table[i].stream = film->audio_stream_index;
+            film->sample_table[i].pts = audio_frame_counter;
+            film->sample_table[i].pts *= film->base_clock;
+            film->sample_table[i].pts /= film->audio_samplerate;
+
+            audio_frame_counter += (film->sample_table[i].sample_size /
+                (film->audio_channels * film->audio_bits / 8));
+        } else {
+            film->sample_table[i].stream = film->video_stream_index;
+            film->sample_table[i].pts = BE_32(&scratch[8]) & 0x7FFFFFFF;
+            film->sample_table[i].keyframe = (scratch[8] & 0x80) ? 0 : 1;
+        }
+    }
+
+    film->current_sample = 0;
+
+    /* set the pts reference to match the tick rate of the file */
+    s->pts_num = 1;
+    s->pts_den = film->base_clock;
+
+    return 0;
+}
+
+static int film_read_packet(AVFormatContext *s,
+                            AVPacket *pkt)
+{
+    FilmDemuxContext *film = (FilmDemuxContext *)s->priv_data;
+    ByteIOContext *pb = &s->pb;
+    film_sample_t *sample;
+    int ret = 0;
+    int i;
+    int left, right;
+
+    if (film->current_sample >= film->sample_count)
+        return -EIO;
+
+    sample = &film->sample_table[film->current_sample];
+
+    /* position the stream (will probably be there anyway) */
+    url_fseek(pb, sample->sample_offset, SEEK_SET);
+
+    /* do a special song and dance when loading FILM Cinepak chunks */
+    if ((sample->stream == film->video_stream_index) && 
+        (film->video_type == CODEC_ID_CINEPAK)) {
+        if (av_new_packet(pkt, sample->sample_size - film->cvid_extra_bytes))
+            return AVERROR_NOMEM;
+        ret = get_buffer(pb, pkt->data, 10);
+        /* skip the non-spec CVID bytes */
+        url_fseek(pb, film->cvid_extra_bytes, SEEK_CUR);
+        ret += get_buffer(pb, pkt->data + 10, 
+            sample->sample_size - 10 - film->cvid_extra_bytes);
+        if (ret != sample->sample_size - film->cvid_extra_bytes)
+            ret = -EIO;
+    } else if ((sample->stream == film->audio_stream_index) &&
+        (film->audio_channels == 2)) {
+        /* stereo PCM needs to be interleaved */
+
+        if (av_new_packet(pkt, sample->sample_size))
+            return AVERROR_NOMEM;
+
+        /* make sure the interleave buffer is large enough */
+        if (sample->sample_size > film->stereo_buffer_size) {
+            av_free(film->stereo_buffer);
+            film->stereo_buffer_size = sample->sample_size;
+            film->stereo_buffer = av_malloc(film->stereo_buffer_size);
+        }
+
+        ret = get_buffer(pb, film->stereo_buffer, sample->sample_size);
+        if (ret != sample->sample_size)
+            ret = -EIO;
+
+        left = 0;
+        right = sample->sample_size / 2;
+        for (i = 0; i < sample->sample_size; ) {
+            if (film->audio_bits == 8) {
+                pkt->data[i++] = film->stereo_buffer[left++];
+                pkt->data[i++] = film->stereo_buffer[right++];
+            } else {
+                pkt->data[i++] = film->stereo_buffer[left++];
+                pkt->data[i++] = film->stereo_buffer[left++];
+                pkt->data[i++] = film->stereo_buffer[right++];
+                pkt->data[i++] = film->stereo_buffer[right++];
+            }
+        }
+    } else {
+        if (av_new_packet(pkt, sample->sample_size))
+            return AVERROR_NOMEM;
+        ret = get_buffer(pb, pkt->data, sample->sample_size);
+        if (ret != sample->sample_size)
+            ret = -EIO;
+    }
+
+    pkt->stream_index = sample->stream;
+    pkt->pts = sample->pts;
+
+    film->current_sample++;
+
+    return ret;
+}
+
+static int film_read_close(AVFormatContext *s)
+{
+    FilmDemuxContext *film = (FilmDemuxContext *)s->priv_data;
+
+    av_free(film->sample_table);
+    av_free(film->stereo_buffer);
+
+    return 0;
+}
+
+static AVInputFormat film_iformat = {
+    "film_cpk",
+    "Sega FILM/CPK format",
+    sizeof(FilmDemuxContext),
+    film_probe,
+    film_read_header,
+    film_read_packet,
+    film_read_close,
+};
+
+int film_init(void)
+{
+    av_register_input_format(&film_iformat);
+    return 0;
+}