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xmv: Add some doxygen comments 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Sven Hesse 2011-08-18 19:00:21 +02:00 committed by Michael Niedermayer
parent 6fb501245d
commit 730333efc4
1 changed files with 43 additions and 39 deletions
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82
libavformat/xmv.c
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@ -32,73 +32,77 @@
#include "avformat.h"
#include "riff.h"
/** The min size of an XMV header. */
#define XMV_MIN_HEADER_SIZE 36
/** Audio flag: ADPCM'd 5.1 stream, front left / right channels */
#define XMV_AUDIO_ADPCM51_FRONTLEFTRIGHT 1
/** Audio flag: ADPCM'd 5.1 stream, front center / low frequency channels */
#define XMV_AUDIO_ADPCM51_FRONTCENTERLOW 2
/** Audio flag: ADPCM'd 5.1 stream, rear left / right channels */
#define XMV_AUDIO_ADPCM51_REARLEFTRIGHT 4
/** Audio flag: Any of the ADPCM'd 5.1 stream flags. */
#define XMV_AUDIO_ADPCM51 (XMV_AUDIO_ADPCM51_FRONTLEFTRIGHT | \
XMV_AUDIO_ADPCM51_FRONTCENTERLOW | \
XMV_AUDIO_ADPCM51_REARLEFTRIGHT)
/** A video packet with an XMV file. */
typedef struct XMVVideoPacket {
/* The decoder stream index for this video packet. */
int stream_index;
int stream_index; ///< The decoder stream index for this video packet.
uint32_t data_size;
uint64_t data_offset;
uint32_t data_size; ///< The size of the remaining video data.
uint64_t data_offset; ///< The offset of the video data within the file.
uint32_t current_frame;
uint32_t frame_count;
uint32_t current_frame; ///< The current frame within this video packet.
uint32_t frame_count; ///< The amount of frames within this video packet.
/* Does the video packet contain extra data? */
int has_extradata;
int has_extradata; ///< Does the video packet contain extra data?
uint8_t extradata[4]; ///< The extra data
/* Extra data */
uint8_t extradata[4];
int64_t last_pts;
int64_t pts;
int64_t last_pts; ///< PTS of the last video frame.
int64_t pts; ///< PTS of the most current video frame.
} XMVVideoPacket;
/** An audio packet with an XMV file. */
typedef struct XMVAudioPacket {
/* The decoder stream index for this audio packet. */
int stream_index;
int stream_index; ///< The decoder stream index for this audio packet.
uint16_t compression;
uint16_t channels;
uint32_t sample_rate;
uint16_t bits_per_sample;
uint32_t bit_rate;
uint16_t flags;
uint16_t block_align;
uint16_t block_samples;
/* Stream format properties. */
uint16_t compression; ///< The type of compression.
uint16_t channels; ///< Number of channels.
uint32_t sample_rate; ///< Sampling rate.
uint16_t bits_per_sample; ///< Bits per compressed sample.
uint32_t bit_rate; ///< Bits of compressed data per second.
uint16_t flags; ///< Flags
uint16_t block_align; ///< Bytes per compressed block.
uint16_t block_samples; ///< Decompressed samples per compressed block.
enum CodecID codec_id;
enum CodecID codec_id; ///< The codec ID of the compression scheme.
uint32_t data_size;
uint64_t data_offset;
uint32_t data_size; ///< The size of the remaining audio data.
uint64_t data_offset; ///< The offset of the audio data within the file.
uint32_t frame_size;
uint32_t frame_size; ///< Number of bytes to put into an audio frame.
uint64_t block_count;
uint64_t block_count; ///< Running counter of decompressed audio block.
} XMVAudioPacket;
/** Context for demuxing an XMV file. */
typedef struct XMVDemuxContext {
uint16_t audio_track_count;
uint16_t audio_track_count; ///< Number of audio track in this file.
uint32_t this_packet_size;
uint32_t next_packet_size;
uint32_t this_packet_size; ///< Size of the current packet.
uint32_t next_packet_size; ///< Size of the next packet.
uint64_t this_packet_offset;
uint64_t next_packet_offset;
uint64_t this_packet_offset; ///< Offset of the current packet.
uint64_t next_packet_offset; ///< Offset of the next packet.
uint16_t current_stream;
uint16_t stream_count;
uint16_t current_stream; ///< The index of the stream currently handling.
uint16_t stream_count; ///< The number of streams in this file.
XMVVideoPacket video;
XMVAudioPacket *audio;
XMVVideoPacket video; ///< The video packet contained in each packet.
XMVAudioPacket *audio; ///< The audio packets contained in each packet.
} XMVDemuxContext;
static int xmv_probe(AVProbeData *p)
@ -219,7 +223,7 @@ static int xmv_read_header(AVFormatContext *s,
}
/** Initialize the packet context */
/* Initialize the packet context */
xmv->next_packet_offset = avio_tell(pb);
@ -324,7 +328,7 @@ static int xmv_process_packet_header(AVFormatContext *s)
*/
packet->data_size = xmv->audio[audio_track - 1].data_size;
/** Carve up the audio data in frame_count slices */
/* Carve up the audio data in frame_count slices */
packet->frame_size = packet->data_size / xmv->video.frame_count;
packet->frame_size -= packet->frame_size % packet->block_align;
}