* Copyright (c) 2011 Sven Hesse <drmccoy@drmccoy.de>
* Copyright (c) 2011 Matthew Hoops <clone2727@gmail.com>
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "internal.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)
-typedef struct XMVAudioTrack {
- 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;
-
- enum CodecID codec_id;
-} XMVAudioTrack;
-
+/** A video packet with an XMV file. */
typedef struct XMVVideoPacket {
- /* The decoder stream index for this video packet. */
- int stream_index;
-
- uint32_t data_size;
- uint32_t data_offset;
+ int stream_index; ///< The decoder stream index for this video packet.
- uint32_t current_frame;
- uint32_t frame_count;
+ uint32_t data_size; ///< The size of the remaining video data.
+ uint64_t data_offset; ///< The offset of the video data within the file.
- /* Does the video packet contain extra data? */
- int has_extradata;
+ uint32_t current_frame; ///< The current frame within this video packet.
+ uint32_t frame_count; ///< The amount of frames within this video packet.
- /* Extra data */
- uint8_t extradata[4];
+ int has_extradata; ///< Does the video packet contain extra data?
+ uint8_t extradata[4]; ///< The extra data
- 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.
- /* The audio track this packet encodes. */
- XMVAudioTrack *track;
+ /* 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.
- uint32_t data_size;
- uint32_t data_offset;
+ enum CodecID codec_id; ///< The codec ID of the compression scheme.
- uint32_t frame_size;
+ 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 block_count;
+ uint32_t frame_size; ///< Number of bytes to put into an audio frame.
+
+ 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.
- XMVAudioTrack *audio_tracks;
+ uint32_t this_packet_size; ///< Size of the current packet.
+ uint32_t next_packet_size; ///< Size of the next packet.
- uint32_t this_packet_size;
- uint32_t next_packet_size;
+ uint64_t this_packet_offset; ///< Offset of the current packet.
+ uint64_t next_packet_offset; ///< Offset of the next packet.
- uint32_t this_packet_offset;
- uint32_t next_packet_offset;
+ uint16_t current_stream; ///< The index of the stream currently handling.
+ uint16_t stream_count; ///< The number of streams in this file.
- uint16_t current_stream;
- uint16_t stream_count;
-
- 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)
avio_skip(pb, 2); /* Unknown (padding?) */
- xmv->audio_tracks = av_malloc(xmv->audio_track_count * sizeof(XMVAudioTrack));
- if (!xmv->audio_tracks)
- return AVERROR(ENOMEM);
-
xmv->audio = av_malloc(xmv->audio_track_count * sizeof(XMVAudioPacket));
if (!xmv->audio)
return AVERROR(ENOMEM);
for (audio_track = 0; audio_track < xmv->audio_track_count; audio_track++) {
- XMVAudioTrack *track = &xmv->audio_tracks[audio_track];
- XMVAudioPacket *packet = &xmv->audio [audio_track];
+ XMVAudioPacket *packet = &xmv->audio[audio_track];
AVStream *ast = NULL;
- track->compression = avio_rl16(pb);
- track->channels = avio_rl16(pb);
- track->sample_rate = avio_rl32(pb);
- track->bits_per_sample = avio_rl16(pb);
- track->flags = avio_rl16(pb);
-
- track->bit_rate = track->bits_per_sample *
- track->sample_rate *
- track->channels;
- track->block_align = 36 * track->channels;
- track->block_samples = 64;
- track->codec_id = ff_wav_codec_get_id(track->compression,
- track->bits_per_sample);
-
- packet->track = track;
+ packet->compression = avio_rl16(pb);
+ packet->channels = avio_rl16(pb);
+ packet->sample_rate = avio_rl32(pb);
+ packet->bits_per_sample = avio_rl16(pb);
+ packet->flags = avio_rl16(pb);
+
+ packet->bit_rate = packet->bits_per_sample *
+ packet->sample_rate *
+ packet->channels;
+ packet->block_align = 36 * packet->channels;
+ packet->block_samples = 64;
+ packet->codec_id = ff_wav_codec_get_id(packet->compression,
+ packet->bits_per_sample);
+
packet->stream_index = -1;
packet->frame_size = 0;
/* TODO: ADPCM'd 5.1 sound is encoded in three separate streams.
* Those need to be interleaved to a proper 5.1 stream. */
- if (track->flags & XMV_AUDIO_ADPCM51)
+ if (packet->flags & XMV_AUDIO_ADPCM51)
av_log(s, AV_LOG_WARNING, "Unsupported 5.1 ADPCM audio stream "
- "(0x%04X)\n", track->flags);
+ "(0x%04X)\n", packet->flags);
ast = avformat_new_stream(s, NULL);
if (!ast)
return AVERROR(ENOMEM);
ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
- ast->codec->codec_id = track->codec_id;
- ast->codec->codec_tag = track->compression;
- ast->codec->channels = track->channels;
- ast->codec->sample_rate = track->sample_rate;
- ast->codec->bits_per_coded_sample = track->bits_per_sample;
- ast->codec->bit_rate = track->bit_rate;
- ast->codec->block_align = 36 * track->channels;
+ ast->codec->codec_id = packet->codec_id;
+ ast->codec->codec_tag = packet->compression;
+ ast->codec->channels = packet->channels;
+ ast->codec->sample_rate = packet->sample_rate;
+ ast->codec->bits_per_coded_sample = packet->bits_per_sample;
+ ast->codec->bit_rate = packet->bit_rate;
+ ast->codec->block_align = 36 * packet->channels;
- avpriv_set_pts_info(ast, 32, track->block_samples, track->sample_rate);
+ avpriv_set_pts_info(ast, 32, packet->block_samples, packet->sample_rate);
packet->stream_index = ast->index;
}
- /** Initialize the packet context */
+ /* Initialize the packet context */
xmv->next_packet_offset = avio_tell(pb);
xmv->next_packet_size = this_packet_size - xmv->next_packet_offset;
uint8_t data[8];
uint16_t audio_track;
- uint32_t data_offset;
+ uint64_t data_offset;
/* Next packet size */
xmv->next_packet_size = avio_rl32(pb);
*/
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->track->block_align;
+ packet->frame_size -= packet->frame_size % packet->block_align;
}
/* Packet data offsets */
/* Calculate the PTS */
- block_count = data_size / audio->track->block_align;
+ block_count = data_size / audio->block_align;
pkt->duration = block_count;
pkt->pts = audio->block_count;
int result;
uint32_t frame_header;
uint32_t frame_size, frame_timestamp;
- uint32_t i;
+ uint8_t *data, *end;
/* Seek to it */
if (avio_seek(pb, video->data_offset, SEEK_SET) != video->data_offset)
if ((frame_size + 4) > video->data_size)
return AVERROR(EIO);
- /* Create the packet */
- result = av_new_packet(pkt, frame_size);
- if (result)
+ /* Get the packet data */
+ result = av_get_packet(pb, pkt, frame_size);
+ if (result != frame_size)
return result;
/* Contrary to normal WMV2 video, the bit stream in XMV's
* WMV2 is little-endian.
* TODO: This manual swap is of course suboptimal.
*/
- for (i = 0; i < frame_size; i += 4)
- AV_WB32(pkt->data + i, avio_rl32(pb));
+ for (data = pkt->data, end = pkt->data + frame_size; data < end; data += 4)
+ AV_WB32(data, AV_RL32(data));
pkt->stream_index = video->stream_index;
XMVDemuxContext *xmv = s->priv_data;
av_free(xmv->audio);
- av_free(xmv->audio_tracks);
return 0;
}
projects / ffmpeg / blobdiff