* Bethsoft VID format Demuxer
* Copyright (c) 2007 Nicholas Tung
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file bethsoftvid.c
+ * @file
* @brief Bethesda Softworks VID (.vid) file demuxer
* @author Nicholas Tung [ntung (at. ntung com] (2007-03)
- * @sa http://wiki.multimedia.cx/index.php?title=Bethsoft_VID
- * @sa http://www.svatopluk.com/andux/docs/dfvid.html
+ * @see http://wiki.multimedia.cx/index.php?title=Bethsoft_VID
+ * @see http://www.svatopluk.com/andux/docs/dfvid.html
*/
+#include "libavutil/intreadwrite.h"
#include "avformat.h"
-#include "bethsoftvideo.h"
+#include "internal.h"
+#include "libavcodec/bethsoftvideo.h"
+
+#define BVID_PALETTE_SIZE 3 * 256
+
+#define DEFAULT_SAMPLE_RATE 11111
typedef struct BVID_DemuxContext
{
int nframes;
+ int sample_rate; /**< audio sample rate */
+ int width; /**< video width */
+ int height; /**< video height */
/** delay value between frames, added to individual frame delay.
* custom units, which will be added to other custom units (~=16ms according
* to free, unofficial documentation) */
int bethsoft_global_delay;
-
- /** video presentation time stamp.
- * delay = 16 milliseconds * (global_delay + per_frame_delay) */
- int video_pts;
+ int video_index; /**< video stream index */
+ int audio_index; /**< audio stream index */
+ uint8_t *palette;
int is_finished;
static int vid_probe(AVProbeData *p)
{
// little endian VID tag, file starts with "VID\0"
- if (p->buf_size < 4 || AV_RL32(p->buf) != MKTAG('V', 'I', 'D', 0))
+ if (AV_RL32(p->buf) != MKTAG('V', 'I', 'D', 0))
return 0;
return AVPROBE_SCORE_MAX;
}
-static int vid_read_header(AVFormatContext *s,
- AVFormatParameters *ap)
+static int vid_read_header(AVFormatContext *s)
{
BVID_DemuxContext *vid = s->priv_data;
- ByteIOContext *pb = &s->pb;
- AVStream *stream;
+ AVIOContext *pb = s->pb;
/* load main header. Contents:
* bytes: 'V' 'I' 'D'
* int16s: always_512, nframes, width, height, delay, always_14
*/
- url_fseek(pb, 5, SEEK_CUR);
- vid->nframes = get_le16(pb);
-
- stream = av_new_stream(s, 0);
- if (!stream)
- return AVERROR_NOMEM;
- av_set_pts_info(stream, 32, 1, 60); // 16 ms increments, i.e. 60 fps
- stream->codec->codec_type = CODEC_TYPE_VIDEO;
- stream->codec->codec_id = CODEC_ID_BETHSOFTVID;
- stream->codec->width = get_le16(pb);
- stream->codec->height = get_le16(pb);
- stream->codec->pix_fmt = PIX_FMT_PAL8;
- vid->bethsoft_global_delay = get_le16(pb);
- get_le16(pb);
-
- // done with video codec, set up audio codec
- stream = av_new_stream(s, 0);
- if (!stream)
- return AVERROR_NOMEM;
- stream->codec->codec_type = CODEC_TYPE_AUDIO;
- stream->codec->codec_id = CODEC_ID_PCM_U8;
- stream->codec->channels = 1;
- stream->codec->sample_rate = 11025;
- stream->codec->bits_per_sample = 8;
- stream->codec->bit_rate = stream->codec->channels * stream->codec->sample_rate * stream->codec->bits_per_sample;
+ avio_skip(pb, 5);
+ vid->nframes = avio_rl16(pb);
+ vid->width = avio_rl16(pb);
+ vid->height = avio_rl16(pb);
+ vid->bethsoft_global_delay = avio_rl16(pb);
+ avio_rl16(pb);
+
+ // wait until the first packet to create each stream
+ vid->video_index = -1;
+ vid->audio_index = -1;
+ vid->sample_rate = DEFAULT_SAMPLE_RATE;
+ s->ctx_flags |= AVFMTCTX_NOHEADER;
return 0;
}
#define BUFFER_PADDING_SIZE 1000
-static int read_frame(BVID_DemuxContext *vid, ByteIOContext *pb, AVPacket *pkt,
- uint8_t block_type, AVFormatContext *s, int npixels)
+static int read_frame(BVID_DemuxContext *vid, AVIOContext *pb, AVPacket *pkt,
+ uint8_t block_type, AVFormatContext *s)
{
uint8_t * vidbuf_start = NULL;
int vidbuf_nbytes = 0;
- int rle_num_bytes;
+ int code;
int bytes_copied = 0;
- int position;
- size_t vidbuf_capacity;
+ int position, duration, npixels;
+ unsigned int vidbuf_capacity;
+ int ret = 0;
+ AVStream *st;
+
+ if (vid->video_index < 0) {
+ st = avformat_new_stream(s, NULL);
+ if (!st)
+ return AVERROR(ENOMEM);
+ vid->video_index = st->index;
+ if (vid->audio_index < 0) {
+ av_log_ask_for_sample(s, "No audio packet before first video "
+ "packet. Using default video time base.\n");
+ }
+ avpriv_set_pts_info(st, 64, 185, vid->sample_rate);
+ st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+ st->codec->codec_id = CODEC_ID_BETHSOFTVID;
+ st->codec->width = vid->width;
+ st->codec->height = vid->height;
+ }
+ st = s->streams[vid->video_index];
+ npixels = st->codec->width * st->codec->height;
vidbuf_start = av_malloc(vidbuf_capacity = BUFFER_PADDING_SIZE);
if(!vidbuf_start)
- return AVERROR_NOMEM;
+ return AVERROR(ENOMEM);
// save the file position for the packet, include block type
- position = url_ftell(pb) - 1;
+ position = avio_tell(pb) - 1;
vidbuf_start[vidbuf_nbytes++] = block_type;
- // get the video delay (next int16), and set the presentation time
- vid->video_pts += vid->bethsoft_global_delay + get_le16(pb);
+ // get the current packet duration
+ duration = vid->bethsoft_global_delay + avio_rl16(pb);
// set the y offset if it exists (decoder header data should be in data section)
if(block_type == VIDEO_YOFF_P_FRAME){
- if(get_buffer(pb, &vidbuf_start[vidbuf_nbytes], 2) != 2)
+ if (avio_read(pb, &vidbuf_start[vidbuf_nbytes], 2) != 2) {
+ ret = AVERROR(EIO);
goto fail;
+ }
vidbuf_nbytes += 2;
}
do{
vidbuf_start = av_fast_realloc(vidbuf_start, &vidbuf_capacity, vidbuf_nbytes + BUFFER_PADDING_SIZE);
if(!vidbuf_start)
- return AVERROR_NOMEM;
+ return AVERROR(ENOMEM);
- rle_num_bytes = get_byte(pb);
- vidbuf_start[vidbuf_nbytes++] = rle_num_bytes;
+ code = avio_r8(pb);
+ vidbuf_start[vidbuf_nbytes++] = code;
- if(rle_num_bytes > 0x80){ // rle sequence
+ if(code >= 0x80){ // rle sequence
if(block_type == VIDEO_I_FRAME)
- vidbuf_start[vidbuf_nbytes++] = get_byte(pb);
- bytes_copied += rle_num_bytes - 0x80;
- } else if(rle_num_bytes){ // plain sequence
- if(get_buffer(pb, &vidbuf_start[vidbuf_nbytes], rle_num_bytes) != rle_num_bytes)
+ vidbuf_start[vidbuf_nbytes++] = avio_r8(pb);
+ } else if(code){ // plain sequence
+ if (avio_read(pb, &vidbuf_start[vidbuf_nbytes], code) != code) {
+ ret = AVERROR(EIO);
goto fail;
- vidbuf_nbytes += rle_num_bytes;
- bytes_copied += rle_num_bytes;
+ }
+ vidbuf_nbytes += code;
}
+ bytes_copied += code & 0x7F;
if(bytes_copied == npixels){ // sometimes no stop character is given, need to keep track of bytes copied
// may contain a 0 byte even if read all pixels
- if(get_byte(pb))
- url_fseek(pb, -1, SEEK_CUR);
+ if(avio_r8(pb))
+ avio_seek(pb, -1, SEEK_CUR);
break;
}
- if(bytes_copied > npixels)
+ if (bytes_copied > npixels) {
+ ret = AVERROR_INVALIDDATA;
goto fail;
- } while(rle_num_bytes);
+ }
+ } while(code);
// copy data into packet
- if(av_new_packet(pkt, vidbuf_nbytes) < 0)
+ if ((ret = av_new_packet(pkt, vidbuf_nbytes)) < 0)
goto fail;
memcpy(pkt->data, vidbuf_start, vidbuf_nbytes);
av_free(vidbuf_start);
pkt->pos = position;
- pkt->stream_index = 0; // use the video decoder, which was initialized as the first stream
- pkt->pts = vid->video_pts;
+ pkt->stream_index = vid->video_index;
+ pkt->duration = duration;
+ if (block_type == VIDEO_I_FRAME)
+ pkt->flags |= AV_PKT_FLAG_KEY;
+
+ /* if there is a new palette available, add it to packet side data */
+ if (vid->palette) {
+ uint8_t *pdata = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE,
+ BVID_PALETTE_SIZE);
+ memcpy(pdata, vid->palette, BVID_PALETTE_SIZE);
+ av_freep(&vid->palette);
+ }
vid->nframes--; // used to check if all the frames were read
- return vidbuf_nbytes;
+ return 0;
fail:
av_free(vidbuf_start);
- return -1;
+ return ret;
}
static int vid_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
BVID_DemuxContext *vid = s->priv_data;
- ByteIOContext *pb = &s->pb;
+ AVIOContext *pb = s->pb;
unsigned char block_type;
int audio_length;
int ret_value;
- if(vid->is_finished || url_feof(pb))
- return AVERROR_IO;
+ if(vid->is_finished || pb->eof_reached)
+ return AVERROR(EIO);
- block_type = get_byte(pb);
+ block_type = avio_r8(pb);
switch(block_type){
case PALETTE_BLOCK:
- url_fseek(pb, -1, SEEK_CUR); // include block type
- ret_value = av_get_packet(pb, pkt, 3 * 256 + 1);
- if(ret_value != 3 * 256 + 1){
- av_free_packet(pkt);
- return AVERROR_IO;
+ if (vid->palette) {
+ av_log(s, AV_LOG_WARNING, "discarding unused palette\n");
+ av_freep(&vid->palette);
}
- pkt->stream_index = 0;
- return ret_value;
+ vid->palette = av_malloc(BVID_PALETTE_SIZE);
+ if (!vid->palette)
+ return AVERROR(ENOMEM);
+ if (avio_read(pb, vid->palette, BVID_PALETTE_SIZE) != BVID_PALETTE_SIZE) {
+ av_freep(&vid->palette);
+ return AVERROR(EIO);
+ }
+ return vid_read_packet(s, pkt);
case FIRST_AUDIO_BLOCK:
- get_le16(pb);
+ avio_rl16(pb);
// soundblaster DAC used for sample rate, as on specification page (link above)
- s->streams[1]->codec->sample_rate = 1000000 / (256 - get_byte(pb));
- s->streams[1]->codec->bit_rate = s->streams[1]->codec->channels * s->streams[1]->codec->sample_rate * s->streams[1]->codec->bits_per_sample;
+ vid->sample_rate = 1000000 / (256 - avio_r8(pb));
case AUDIO_BLOCK:
- audio_length = get_le16(pb);
- ret_value = av_get_packet(pb, pkt, audio_length);
- pkt->stream_index = 1;
- return (ret_value != audio_length ? AVERROR_IO : ret_value);
+ if (vid->audio_index < 0) {
+ AVStream *st = avformat_new_stream(s, NULL);
+ if (!st)
+ return AVERROR(ENOMEM);
+ vid->audio_index = st->index;
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codec->codec_id = CODEC_ID_PCM_U8;
+ st->codec->channels = 1;
+ st->codec->bits_per_coded_sample = 8;
+ st->codec->sample_rate = vid->sample_rate;
+ st->codec->bit_rate = 8 * st->codec->sample_rate;
+ st->start_time = 0;
+ avpriv_set_pts_info(st, 64, 1, vid->sample_rate);
+ }
+ audio_length = avio_rl16(pb);
+ if ((ret_value = av_get_packet(pb, pkt, audio_length)) != audio_length) {
+ if (ret_value < 0)
+ return ret_value;
+ av_log(s, AV_LOG_ERROR, "incomplete audio block\n");
+ return AVERROR(EIO);
+ }
+ pkt->stream_index = vid->audio_index;
+ pkt->duration = audio_length;
+ pkt->flags |= AV_PKT_FLAG_KEY;
+ return 0;
case VIDEO_P_FRAME:
case VIDEO_YOFF_P_FRAME:
case VIDEO_I_FRAME:
- return read_frame(vid, pb, pkt, block_type, s,
- s->streams[0]->codec->width * s->streams[0]->codec->height);
+ return read_frame(vid, pb, pkt, block_type, s);
case EOF_BLOCK:
if(vid->nframes != 0)
av_log(s, AV_LOG_VERBOSE, "reached terminating character but not all frames read.\n");
vid->is_finished = 1;
- return AVERROR_IO;
+ return AVERROR(EIO);
default:
av_log(s, AV_LOG_ERROR, "unknown block (character = %c, decimal = %d, hex = %x)!!!\n",
- block_type, block_type, block_type); return -1;
+ block_type, block_type, block_type);
+ return AVERROR_INVALIDDATA;
}
+}
+static int vid_read_close(AVFormatContext *s)
+{
+ BVID_DemuxContext *vid = s->priv_data;
+ av_freep(&vid->palette);
return 0;
}
-AVInputFormat bethsoftvid_demuxer = {
- "bethsoftvid",
- "Bethesda Softworks 'Daggerfall' VID format",
- sizeof(BVID_DemuxContext),
- vid_probe,
- vid_read_header,
- vid_read_packet,
+AVInputFormat ff_bethsoftvid_demuxer = {
+ .name = "bethsoftvid",
+ .long_name = NULL_IF_CONFIG_SMALL("Bethesda Softworks VID"),
+ .priv_data_size = sizeof(BVID_DemuxContext),
+ .read_probe = vid_probe,
+ .read_header = vid_read_header,
+ .read_packet = vid_read_packet,
+ .read_close = vid_read_close,
};
projects / ffmpeg / blobdiff