*/
/**
- * @file bethsoftvid.c
+ * @file libavformat/bethsoftvid.c
* @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
*/
+#include "libavutil/intreadwrite.h"
#include "avformat.h"
-#include "bethsoftvideo.h"
+#include "libavcodec/bethsoftvideo.h"
typedef struct BVID_DemuxContext
{
/** video presentation time stamp.
* delay = 16 milliseconds * (global_delay + per_frame_delay) */
- int64_t video_pts;
+ int video_pts;
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)
{
- BVID_DemuxContext *vid = s->priv_data; // permanent data outside of function
- ByteIOContext *pb = &s->pb; // io to file
+ BVID_DemuxContext *vid = s->priv_data;
+ ByteIOContext *pb = s->pb;
AVStream *stream;
/* load main header. Contents:
url_fseek(pb, 5, SEEK_CUR);
vid->nframes = get_le16(pb);
- // FFmpeg central code will use this; don't need to return or anything
- // initialize the bethsoft codec
stream = av_new_stream(s, 0);
- if (!stream) { return AVERROR_NOMEM; }
+ if (!stream)
+ return AVERROR(ENOMEM);
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;
// done with video codec, set up audio codec
stream = av_new_stream(s, 0);
- if (!stream) { return AVERROR_NOMEM; }
+ if (!stream)
+ return AVERROR(ENOMEM);
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;
+ stream->codec->bits_per_coded_sample = 8;
+ stream->codec->bit_rate = stream->codec->channels * stream->codec->sample_rate * stream->codec->bits_per_coded_sample;
return 0;
}
{
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;
+ unsigned int vidbuf_capacity;
vidbuf_start = av_malloc(vidbuf_capacity = BUFFER_PADDING_SIZE);
- if(!vidbuf_start) { return AVERROR_NOMEM; }
+ if(!vidbuf_start)
+ return AVERROR(ENOMEM);
// save the file position for the packet, include block type
position = url_ftell(pb) - 1;
- // set the block type for the decoder
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);
// set the y offset if it exists (decoder header data should be in data section)
- if(block_type == VIDEO_YOFFSET_DIFFERENCE_FRAME_BLOCK)
- {
- if(get_buffer(pb, &vidbuf_start[vidbuf_nbytes], 2) != 2) { return AVERROR_IO; }
+ if(block_type == VIDEO_YOFF_P_FRAME){
+ if(get_buffer(pb, &vidbuf_start[vidbuf_nbytes], 2) != 2)
+ goto fail;
vidbuf_nbytes += 2;
}
- do
- {
+ do{
vidbuf_start = av_fast_realloc(vidbuf_start, &vidbuf_capacity, vidbuf_nbytes + BUFFER_PADDING_SIZE);
- if(!vidbuf_start) { return AVERROR_NOMEM; }
-
- rle_num_bytes = get_byte(pb);
- vidbuf_start[vidbuf_nbytes++] = rle_num_bytes;
-
- if(rle_num_bytes > 0x80) // rle sequence
- {
- if(block_type == VIDEO_FULL_FRAME_BLOCK) { 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)
- return AVERROR_IO;
- vidbuf_nbytes += rle_num_bytes;
- bytes_copied += rle_num_bytes;
+ if(!vidbuf_start)
+ return AVERROR(ENOMEM);
+
+ code = get_byte(pb);
+ vidbuf_start[vidbuf_nbytes++] = code;
+
+ if(code >= 0x80){ // rle sequence
+ if(block_type == VIDEO_I_FRAME)
+ vidbuf_start[vidbuf_nbytes++] = get_byte(pb);
+ } else if(code){ // plain sequence
+ if(get_buffer(pb, &vidbuf_start[vidbuf_nbytes], code) != code)
+ goto fail;
+ vidbuf_nbytes += code;
}
- if(bytes_copied == npixels) // sometimes no stop character is given, need to keep track of bytes copied
- {
+ 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(get_byte(pb))
+ url_fseek(pb, -1, SEEK_CUR);
break;
}
- if(bytes_copied > npixels) { return -1; } // error
- } while(rle_num_bytes);
+ if(bytes_copied > npixels)
+ goto fail;
+ } while(code);
// copy data into packet
- if(av_new_packet(pkt, vidbuf_nbytes)) { return AVERROR_NOMEM; }
+ if(av_new_packet(pkt, vidbuf_nbytes) < 0)
+ goto fail;
memcpy(pkt->data, vidbuf_start, vidbuf_nbytes);
av_free(vidbuf_start);
vid->nframes--; // used to check if all the frames were read
return vidbuf_nbytes;
+fail:
+ av_free(vidbuf_start);
+ return -1;
}
static int vid_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
- BVID_DemuxContext *vid = s->priv_data; // permanent data outside of function
- ByteIOContext *pb = &s->pb; // io to file
- unsigned char block_type; // block type
+ BVID_DemuxContext *vid = s->priv_data;
+ ByteIOContext *pb = s->pb;
+ unsigned char block_type;
int audio_length;
int ret_value;
- av_log(s, AV_LOG_DEBUG, "[bethsoftvid demuxer read_packet]");
-
- if(vid->is_finished || url_feof(pb)) { return AVERROR_IO; }
+ if(vid->is_finished || url_feof(pb))
+ return AVERROR(EIO);
block_type = get_byte(pb);
- switch(block_type)
- {
+ switch(block_type){
case PALETTE_BLOCK:
- av_log(s, AV_LOG_DEBUG, "palette block.\n");
url_fseek(pb, -1, SEEK_CUR); // include block type
- ret_value = av_get_packet(pb, pkt, 3 * VID_PALETTE_NUMCOLORS + 1);
- if(ret_value != 3 * VID_PALETTE_NUMCOLORS + 1) { av_free_packet(pkt); return AVERROR_IO; }
+ ret_value = av_get_packet(pb, pkt, 3 * 256 + 1);
+ if(ret_value != 3 * 256 + 1){
+ av_free_packet(pkt);
+ return AVERROR(EIO);
+ }
pkt->stream_index = 0;
return ret_value;
case FIRST_AUDIO_BLOCK:
- av_log(s, AV_LOG_DEBUG, "first ");
- get_le16(pb); // some unused constant
+ get_le16(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;
+ s->streams[1]->codec->bit_rate = s->streams[1]->codec->channels * s->streams[1]->codec->sample_rate * s->streams[1]->codec->bits_per_coded_sample;
case AUDIO_BLOCK:
- av_log(s, AV_LOG_DEBUG, "audio block.\n");
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);
+ return ret_value != audio_length ? AVERROR(EIO) : ret_value;
- case VIDEO_DIFFERENCE_FRAME_BLOCK: av_log(s, AV_LOG_DEBUG, "non-");
- case VIDEO_YOFFSET_DIFFERENCE_FRAME_BLOCK: av_log(s, AV_LOG_DEBUG, "offset ");
- case VIDEO_FULL_FRAME_BLOCK: av_log(s, AV_LOG_DEBUG, "video block.\n");
+ 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);
- case FINISHED_BLOCK:
+ 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;
- av_log(s, AV_LOG_DEBUG, "terminating block.\n");
- 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;
AVInputFormat bethsoftvid_demuxer = {
"bethsoftvid",
- "Bethesda Softworks 'Daggerfall' VID format",
+ NULL_IF_CONFIG_SMALL("Bethesda Softworks VID format"),
sizeof(BVID_DemuxContext),
vid_probe,
vid_read_header,
projects / ffmpeg / blobdiff