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/*
* DV format muxer/demuxer
* Copyright (c) 2003 Roman Shaposhnik
*
* Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth
* of DV technical info, and SMPTE 314M specification.
*
* 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
*/
#include <time.h>
#include "avformat.h"
/*
* DVprofile is used to express the differences between various
* DV flavors. For now it's primarily used for differentiating
* 525/60 and 625/50, but the plans are to use it for various
* DV specs as well (e.g. SMPTE314M vs. IEC 61834).
*/
typedef struct DVprofile {
int dsf; /* value of the dsf in the DV header */
int frame_size; /* total size of one frame in bytes */
int difseg_size; /* number of DIF segments */
int frame_rate;
int frame_rate_base;
int ltc_divisor; /* FPS from the LTS standpoint */
int height; /* picture height in pixels */
uint16_t *video_place; /* positions of all DV macro blocks */
int audio_stride; /* size of audio_shuffle table */
int audio_min_samples[3]; /* min ammount of audio samples */
/* for 48Khz, 44.1Khz and 32Khz */
int audio_samples_dist[5];/* how many samples are supposed to be */
/* in each frame in a 5 frames window */
const uint16_t (*audio_shuffle)[9]; /* PCM shuffling table */
} DVprofile;
typedef struct DVMuxContext {
const DVprofile* sys; /* Current DV profile. E.g.: 525/60, 625/50 */
uint8_t frame_buf[144000]; /* frame under contruction */
FifoBuffer audio_data; /* Fifo for storing excessive amounts of PCM */
int frames; /* Number of a current frame */
time_t start_time; /* Start time of recording */
uint8_t aspect; /* Aspect ID 0 - 4:3, 7 - 16:9 */
int ast, vst; /* Audio and Video stream indecies */
int has_audio; /* frame under contruction has audio */
int has_video; /* frame under contruction has video */
} DVMuxContext;
void dv_format_frame(DVMuxContext *, uint8_t*);
void dv_inject_audio(DVMuxContext *, uint8_t*, uint8_t*);
void dv_inject_video(DVMuxContext *, uint8_t*, uint8_t*);
int dv_extract_audio(uint8_t*, uint8_t*, AVCodecContext*);
int dv_audio_frame_size(const DVprofile*, int);
void dv_assemble_frame(DVMuxContext *, uint8_t*, uint8_t*, int);
int dv_core_init(DVMuxContext *, AVStream*[]);
void dv_core_delete(DVMuxContext *);
const DVprofile* dv_frame_profile(uint8_t*);
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