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|
/*
* decode_dv.c - Digital Video decoding routines, using libdv
* Written by Andrew Church <achurch@achurch.org>
*
* This file is part of transcode, a video stream processing tool.
* transcode is free software, distributable under the terms of the GNU
* General Public License (version 2 or later). See the file COPYING
* for details.
*/
#include "transcode.h"
#include "tcinfo.h"
#include "libtcvideo/tcvideo.h"
#include "ioaux.h" /* for import_exit() prototype */
#include "tc.h" /* for function prototypes */
#ifdef HAVE_LIBDV
# include <libdv/dv.h>
#endif
#define DV_FRAME_SIZE_525_60 120000
#define DV_FRAME_SIZE_625_50 144000
/* Redefine libdv constants to match our naming style */
#define DV_SYSTEM_525_60 e_dv_system_525_60
#define DV_SYSTEM_625_50 e_dv_system_625_50
#define DV_COLOR_YUV e_dv_color_yuv
#define DV_COLOR_RGB e_dv_color_rgb
/*************************************************************************/
#ifdef HAVE_LIBDV
/**
* check_yuy2: Internal routine to check whether libdv returns YUY2 or
* YV12 data for PAL DV frames.
*
* Parameters:
* None.
* Return value:
* 1 if the decoded video data is in YUY2 format,
* 0 if the decoded video data is in YV12 format,
* -1 if the decoded video data format is unknown.
*/
static int check_yuy2(void)
{
static uint8_t dv_frame[12][150][80]; /* Input DV frame (generated) */
static uint8_t Y[720*576*2]; /* Output Y/YUY2 plane */
static uint8_t U[(720/2)*(576/2)]; /* Output U plane */
static uint8_t V[(720/2)*(576/2)]; /* Output V plane */
uint8_t *video[3] = {Y, U, V};
int linesize[3] = {720*2, 720/2, 720/2};
dv_decoder_t *decoder;
int i, j, k;
/* Generate an off-white PAL DV frame (Y=0xD0 U/V=0x80) */
for (i = 0; i < 12; i++) {
dv_frame[i][0][0] = 0x1F;
dv_frame[i][0][1] = i<<4 | 0x07;
dv_frame[i][0][2] = 0x00;
dv_frame[i][0][3] = 0xBF;
dv_frame[i][0][4] = 0x68;
dv_frame[i][0][5] = 0x78;
dv_frame[i][0][6] = 0x78;
dv_frame[i][0][7] = 0x78;
memset(&dv_frame[i][0][8], 0xFF, 72);
for (j = 0; j < 2; j++) {
dv_frame[i][j+1][0] = 0x3F;
dv_frame[i][j+1][1] = i<<4 | 0x07;
dv_frame[i][j+1][2] = j;
dv_frame[i][j+1][3] = (i>=6 ? 0x80 : 0) | ((i+12) >> 3);
dv_frame[i][j+1][4] = ((i+12) << 5) | (j*6);
memset(&dv_frame[i][j+1][5], 0xFF, 75);
}
for (j = 0; j < 3; j++) {
dv_frame[i][j+3][0] = 0x5F;
dv_frame[i][j+3][1] = i<<4 | 0x07;
dv_frame[i][j+3][2] = j;
memset(&dv_frame[i][j+3][3], 0xFF, 77);
if (i == 0 && j == 0) {
dv_frame[i][j+3][ 3] = 0x70;
dv_frame[i][j+3][ 4] = 0xC5;
dv_frame[i][j+3][ 5] = 0x41;
dv_frame[i][j+3][ 6] = 0x20;
dv_frame[i][j+3][ 7] = 0xFF;
dv_frame[i][j+3][ 8] = 0x71;
dv_frame[i][j+3][ 9] = 0xFF;
dv_frame[i][j+3][10] = 0x7F;
dv_frame[i][j+3][11] = 0xFF;
dv_frame[i][j+3][12] = 0xFF;
dv_frame[i][j+3][13] = 0x7F;
dv_frame[i][j+3][14] = 0xFF;
dv_frame[i][j+3][15] = 0xFF;
dv_frame[i][j+3][16] = 0x38;
dv_frame[i][j+3][17] = 0x81;
} else if (j == 2) {
dv_frame[i][j+3][48] = 0x60;
dv_frame[i][j+3][48] = 0xFF;
dv_frame[i][j+3][48] = 0xFF;
dv_frame[i][j+3][48] = 0x20;
dv_frame[i][j+3][48] = 0xFF;
dv_frame[i][j+3][48] = 0x61;
dv_frame[i][j+3][48] = 0x33;
dv_frame[i][j+3][48] = 0xC8;
dv_frame[i][j+3][48] = 0xFD;
dv_frame[i][j+3][48] = 0xFF;
}
}
for (j = 0; j < 9; j++) {
dv_frame[i][j*16+6][0] = 0x7B;
dv_frame[i][j*16+6][1] = i<<4 | 0x07;
dv_frame[i][j*16+6][2] = j;
if (j == 0) {
dv_frame[i][j*16+6][3] = 0x50;
dv_frame[i][j*16+6][4] = 0xD8;
dv_frame[i][j*16+6][5] = i>=6 ? 0x01 : 0x00;
dv_frame[i][j*16+6][6] = 0xE0;
dv_frame[i][j*16+6][7] = 0xC0;
} else if (j == 1) {
dv_frame[i][j*16+6][3] = 0x51;
dv_frame[i][j*16+6][4] = 0x33;
dv_frame[i][j*16+6][5] = 0xCF;
dv_frame[i][j*16+6][6] = 0xA0;
dv_frame[i][j*16+6][7] = 0xFF;
} else {
dv_frame[i][j*16+6][3] = 0xFF;
dv_frame[i][j*16+6][4] = 0xFF;
dv_frame[i][j*16+6][5] = 0xFF;
dv_frame[i][j*16+6][6] = 0xFF;
dv_frame[i][j*16+6][7] = 0xFF;
}
memset(&dv_frame[i][j*16+6][8], 0, 72);
for (k = 0; k < 15; k++) {
dv_frame[i][j*16+k+7][0] = 0x9B;
dv_frame[i][j*16+k+7][1] = i<<4 | 0x07;
dv_frame[i][j*16+k+7][2] = j*15 + k;
dv_frame[i][j*16+k+7][3] = 0x0F;
memset(&dv_frame[i][4], 0, 76);
dv_frame[i][j*16+k+7][ 4] = 0x50;
dv_frame[i][j*16+k+7][ 5] = 0x06;
dv_frame[i][j*16+k+7][18] = 0x50;
dv_frame[i][j*16+k+7][19] = 0x06;
dv_frame[i][j*16+k+7][32] = 0x50;
dv_frame[i][j*16+k+7][33] = 0x06;
dv_frame[i][j*16+k+7][46] = 0x50;
dv_frame[i][j*16+k+7][47] = 0x06;
dv_frame[i][j*16+k+7][61] = 0x16;
dv_frame[i][j*16+k+7][71] = 0x26;
}
}
}
/* Decode the generated frame */
decoder = dv_decoder_new(1, 0, 0);
if (!decoder) {
if (verbose & TC_DEBUG) {
tc_log_warn(__FILE__,
"check_yuy2: Unable to initialize DV decoder");
}
return -1;
}
decoder->quality = DV_QUALITY_BEST;
if (dv_parse_header(decoder, (uint8_t *)dv_frame) < 0) {
if (verbose & TC_DEBUG) {
tc_log_warn(__FILE__,
"check_yuy2: Parsing test DV frame header failed");
}
return -1;
}
dv_decode_full_frame(decoder, (uint8_t *)dv_frame, DV_COLOR_YUV,
video, linesize);
dv_decoder_free(decoder);
/* Return whether the frame is YUY2-encoded or not */
if (Y[0] >= 0xCF && Y[0] <= 0xD1) {
if (Y[1] >= 0xCF && Y[1] <= 0xD1) {
/* Planar YUV data */
return 0;
} else if (Y[1] >= 0x7F && Y[1] <= 0x81) {
/* Packed YUY2 data */
return 1;
}
}
/* Else a buggy library? */
if (verbose & TC_DEBUG) {
tc_log_warn(__FILE__,
"check_yuy2: Bad video data (Y=%02X %02X %02X %02X,"
" U=%02X %02X, V=%02X %02X)", Y[0], Y[1], Y[2], Y[3],
U[0], U[1], V[0], V[1]);
}
return -1;
}
#endif // HAVE_LIBDV
/*************************************************************************/
/**
* decode_dv: DV decoding loop, called from tcdecode. Reads raw DV frames
* from stdin and writes the decoded video or audio data to stdout.
*
* Parameters:
* decode: Pointer to decoding parameter structure.
* Return value:
* None.
*/
void decode_dv(decode_t *decode)
{
#ifdef HAVE_LIBDV
dv_decoder_t *decoder;
/* FIXME: should this buffer be static instead (to reduce stack usage)? */
uint8_t framebuf[DV_FRAME_SIZE_625_50]; /* Buffer for input frame */
uint8_t *video[3]; /* Decoded video data */
uint8_t *video_conv_buf[3]; /* For YUY2/420P conversion */
TCVHandle tcvhandle; /* For YUY2/420P conversion */
ImageFormat srcfmt = 0, destfmt = 0; /* For YUY2/420P conversion */
dv_color_space_t colorspace = 0; /* For dv_decode_full_frame() */
int linesize[3], planesize[3]; /* video[] line/plane size */
int video_conv_linesize[3]; /* Same, for video_conv_buf[] */
int16_t audio_in[4][DV_AUDIO_MAX_SAMPLES]; /* Decoded audio data */
int16_t *audio_inptr[4]; /* List of pointers for same */
int16_t audio_out[4*DV_AUDIO_MAX_SAMPLES]; /* Interleaved audio data */
int yuy2_mode; /* libdv YUY2/YV12 selector */
int error = 0; /* Set to signal an error */
int ispal; /* Is it a 625/50 stream? */
int nread; /* Result of tc_pread() */
/**** Sanity check and variable setup ****/
if (!decode) {
tc_log_error(__FILE__, "Invalid parameter to decode_dv()");
import_exit(1);
return;
}
audio_inptr[0] = audio_in[0];
audio_inptr[1] = audio_in[1];
audio_inptr[2] = audio_in[2];
audio_inptr[3] = audio_in[3];
/**** Initialize libtcvideo for potential image format conversion ****/
tcvhandle = tcv_init();
if (!tcvhandle) {
tc_log_error(__FILE__, "Unable to initialize libtcvideo");
import_exit(1);
return;
}
/**** Initialize libdv decoder ****/
decoder = dv_decoder_new(1, 0, 0);
if (!decoder) {
tc_log_error(__FILE__, "Unable to initialize DV decoder");
import_exit(1);
return;
}
switch (decode->quality) {
case 1: decoder->quality = DV_QUALITY_FASTEST; break;
case 2: decoder->quality = DV_QUALITY_AC_1; break;
case 3: decoder->quality = DV_QUALITY_AC_2; break;
case 4: decoder->quality = DV_QUALITY_AC_1 | DV_QUALITY_COLOR; break;
case 5:
default: decoder->quality = DV_QUALITY_BEST; break;
}
/**** Set up image formats and line size per plane (*16) ****/
switch (decode->format) {
case TC_CODEC_YUV420P:
srcfmt = IMG_UNKNOWN; /* Source format not yet known */
destfmt = IMG_YUV420P;
colorspace = DV_COLOR_YUV;
linesize[0] = 16;
linesize[1] = linesize[2] = 8;
break;
case TC_CODEC_YUY2:
srcfmt = IMG_UNKNOWN; /* Source format not yet known */
destfmt = IMG_YUY2;
colorspace = DV_COLOR_YUV;
linesize[0] = 32;
linesize[1] = linesize[2] = 0;
break;
case TC_CODEC_RGB:
srcfmt = destfmt = IMG_RGB24;
colorspace = DV_COLOR_RGB;
linesize[0] = 48;
linesize[1] = linesize[2] = 0;
break;
case TC_CODEC_PCM:
linesize[0] = linesize[1] = linesize[2] = 0; // what video? ;)
break;
default:
tc_log_error(__FILE__, "Invalid output format (%08lX)",
decode->format);
import_exit(1);
return;
}
/**** Read the first frame and analyze the frame header. We start ****
**** by reading in enough data for an NTSC frame; if it turns out ****
**** to be PAL instead, we read the rest of it once we find that ****
**** out. ****/
nread = tc_pread(decode->fd_in, framebuf, DV_FRAME_SIZE_525_60);
if (nread != DV_FRAME_SIZE_525_60) {
tc_log_error(__FILE__, "No DV frames found!");
import_exit(1);
return;
}
if (dv_parse_header(decoder, framebuf) < 0) {
tc_log_error(__FILE__, "Unable to parse frame header!");
import_exit(1);
return;
}
if (decoder->system == DV_SYSTEM_525_60) {
ispal = 0;
} else if (decoder->system == DV_SYSTEM_625_50) {
ispal = 1;
} else {
tc_log_error(__FILE__, "Unknown or invalid DV frame type!");
import_exit(1);
return;
}
if (ispal) {
nread = tc_pread(decode->fd_in, framebuf + DV_FRAME_SIZE_525_60,
DV_FRAME_SIZE_625_50 - DV_FRAME_SIZE_525_60);
if (nread != DV_FRAME_SIZE_625_50 - DV_FRAME_SIZE_525_60) {
tc_log_error(__FILE__, "No DV frames found!");
import_exit(1);
return;
}
}
/**** Print a stream information summary ****/
if (verbose) {
if (decode->format == TC_CODEC_PCM) {
tc_log_info(__FILE__, "audio: %d Hz, %d channels",
decoder->audio->frequency,
decoder->audio->num_channels);
} else {
tc_log_info(__FILE__, "%s video: %dx%d framesize=%lu sampling=%d",
ispal ? "PAL" : "NTSC", decoder->width,
decoder->height, (unsigned long)decoder->frame_size,
decoder->sampling);
}
}
/**** Allocate video buffers ****/
/* Plane 0: packed RGB, packed YUV, or planar Y */
linesize[0] = (linesize[0] * decoder->width) / 16;
planesize[0] = linesize[0] * decoder->height;
/* Plane 1: planar U (half height) */
linesize[1] = (linesize[1] * decoder->width) / 16;
planesize[1] = linesize[1] * (decoder->height/2);
/* Plane 2: planar V (half height) */
linesize[2] = (linesize[2] * decoder->width) / 16;
planesize[2] = linesize[2] * (decoder->height/2);
/* Set up pointers into a contiguous buffer */
video[0] = tc_bufalloc(planesize[0] + planesize[1] + planesize[2]);
video[1] = video[0] + planesize[0];
video[2] = video[1] + planesize[1];
/* Conversion buffer (allocate just in case) */
video_conv_buf[0] = tc_bufalloc(decoder->width * decoder->height * 2);
video_conv_buf[1] = video_conv_buf[0] + decoder->width * decoder->height;
video_conv_buf[2] = video_conv_buf[1] + (decoder->width/2)*decoder->height;
/* Make sure we got everything we need */
if (!video[0] || !video_conv_buf[0]) {
tc_log_error(__FILE__, "No memory for video buffers!");
tc_buffree(video_conv_buf[0]);
tc_buffree(video[0]);
import_exit(1);
return;
}
/**** Determine whether YUV data is YUY2 or YV12 (really I420??) ****/
if (ispal) {
if (decode->dv_yuy2_mode != -1) {
/* User specified --dv_yuy2_mode or --dv_yv12_mode */
yuy2_mode = decode->dv_yuy2_mode;
} else {
int result = check_yuy2();
if (result >= 1)
yuy2_mode = result;
else /* we don't know, use the libdv default of YUY2 as a guess */
yuy2_mode = 1;
}
} else {
/* NTSC is always returned in YUY2 format */
yuy2_mode = 1;
}
if (srcfmt == IMG_UNKNOWN) {
if (yuy2_mode) {
srcfmt = IMG_YUY2;
video_conv_linesize[0] = decoder->width * 2;
video_conv_linesize[1] = video_conv_linesize[2] = 0;
} else {
srcfmt = IMG_YUV420P;
video_conv_linesize[0] = decoder->width;
video_conv_linesize[1] = video_conv_linesize[2] = decoder->width/2;
}
}
/**** Decoding loop ****/
for (;;) {
int toread;
/* Process the data as requested */
switch (decode->format) {
case TC_CODEC_YUV420P:
case TC_CODEC_YUY2:
case TC_CODEC_RGB:
if (srcfmt == destfmt) {
dv_decode_full_frame(decoder, framebuf, colorspace, video,
linesize);
} else {
dv_decode_full_frame(decoder, framebuf, colorspace,
video_conv_buf, video_conv_linesize);
if (!tcv_convert(tcvhandle, video_conv_buf[0], video[0],
decoder->width, decoder->height,
srcfmt, destfmt)) {
tc_log_error(__FILE__, "Image format conversion failed!");
error = 1;
goto done;
}
}
if ((planesize[0] && tc_pwrite(decode->fd_out, video[0],
planesize[0]) != planesize[0])
|| (planesize[1] && tc_pwrite(decode->fd_out, video[1],
planesize[1]) != planesize[1])
|| (planesize[2] && tc_pwrite(decode->fd_out, video[2],
planesize[2]) != planesize[2])
) {
tc_log_error(__FILE__, "Write failed: %s", strerror(errno));
error = 1;
goto done;
}
break;
case TC_CODEC_PCM: {
int i, ch;
int16_t *outptr = audio_out;
dv_decode_full_audio(decoder, framebuf, audio_inptr);
for (i = 0; i < decoder->audio->samples_this_frame; i++) {
for (ch = 0; ch < decoder->audio->num_channels; ch++) {
*outptr++ = audio_in[ch][i];
}
}
i = decoder->audio->samples_this_frame
* decoder->audio->num_channels * 2;
if (tc_pwrite(decode->fd_out, (void *)audio_out, i) != i) {
tc_log_error(__FILE__, "Write failed: %s", strerror(errno));
error = 1;
goto done;
}
break;
} /* case TC_CODEC_PCM */
} /* switch (decode->format) */
/* Read in the next frame, if any, and parse the header */
retry:
toread = ispal ? DV_FRAME_SIZE_625_50 : DV_FRAME_SIZE_525_60;
nread = tc_pread(decode->fd_in, framebuf, toread);
if (nread != toread) {
if (verbose & TC_DEBUG)
tc_log_info(__FILE__, "End of stream reached.");
break;
}
if (dv_parse_header(decoder, framebuf) < 0) {
tc_log_warn(__FILE__, "Unable to parse frame header, skipping...");
goto retry;
}
/* Sanity check: make sure it's the same video system */
if (decoder->system != (ispal ? DV_SYSTEM_625_50 : DV_SYSTEM_525_60)) {
tc_log_error(__FILE__, "Video system (NTSC/PAL) changed"
" midstream! Aborting.");
error = 1;
break;
}
} /* end decoding loop */
/**** All done ****/
done:
tc_buffree(video_conv_buf[0]);
tc_buffree(video[0]);
dv_decoder_free(decoder);
tcv_free(tcvhandle);
import_exit(error ? 1 : 0);
#else /* !HAVE_LIBDV */
tc_log_error(__FILE__, "No support for Digital Video configured - exit.");
import_exit(1);
#endif
}
/*************************************************************************/
/**
* probe_dv: Probe the input stream (on stdin) and set stream parameters
* as appropriate.
*
* Parameters: info: Pointer to stream parameter structure.
* Return value: None.
* Preconditions: None.
*/
void probe_dv(info_t *info)
{
#ifdef HAVE_LIBDV
dv_decoder_t *decoder;
uint8_t framebuf[DV_FRAME_SIZE_525_60]; // FIXME: too big for the stack?
int nread, ispal;
#endif
if (!info) {
tc_log_error(__FILE__, "Invalid parameter to probe_dv()");
return;
}
#ifdef HAVE_LIBDV
/* Read in an NTSC frame; for probing, this is enough for PAL as well */
nread = tc_pread(info->fd_in, framebuf, sizeof(framebuf));
if (nread < sizeof(framebuf)) {
tc_log_error(__FILE__, "Stream too short");
info->error = 1;
return;
}
/* Initialize libdv decoder */
decoder = dv_decoder_new(1, 0, 0);
if (!decoder) {
tc_log_error(__FILE__, "Unable to initialize DV decoder");
info->error = 1;
return;
}
/* Parse frame header and check video system type */
if (dv_parse_header(decoder, framebuf) < 0) {
tc_log_error(__FILE__, "No valid DV frame found");
info->error = 1;
return;
}
if (decoder->system == DV_SYSTEM_525_60) {
ispal = 0;
} else if (decoder->system == DV_SYSTEM_625_50) {
ispal = 1;
} else {
tc_log_error(__FILE__, "Unknown or invalid DV frame type");
info->error = 1;
return;
}
/* Set stream parameters */
info->probe_info->magic = ispal ? TC_MAGIC_PAL : TC_MAGIC_NTSC;
info->probe_info->width = decoder->width;
info->probe_info->height = decoder->height;
info->probe_info->fps = ispal ? PAL_FPS : NTSC_VIDEO;
info->probe_info->frc = ispal ? 3 : 4;
info->probe_info->asr = dv_format_wide(decoder) ? 3 :
dv_format_normal(decoder) ? 2 : 0;
info->probe_info->track[0].samplerate = decoder->audio->frequency;
info->probe_info->track[0].chan = decoder->audio->num_channels;
info->probe_info->track[0].bits = 16;
info->probe_info->track[0].format = CODEC_PCM;
info->probe_info->track[0].bitrate =
(decoder->audio->frequency * decoder->audio->num_channels * 16) / 1000;
info->probe_info->num_tracks = 1;
/* All done */
dv_decoder_free(decoder);
#endif /* HAVE_LIBDV */
/* Even without libdv, we know this much... */
info->probe_info->codec = TC_CODEC_DV;
}
/*************************************************************************/
/*
* Local variables:
* c-file-style: "stroustrup"
* c-file-offsets: ((case-label . *) (statement-case-intro . *))
* indent-tabs-mode: nil
* End:
*
* vim: expandtab shiftwidth=4:
*/
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