* Dirac encoder support via Schroedinger libraries
* Copyright (c) 2008 BBC, Anuradha Suraparaju <asuraparaju at gmail dot com >
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avcodec.h"
#include "libdirac_libschro.h"
#include "libschroedinger.h"
+#include "bytestream.h"
/** libschroedinger encoder private data */
-typedef struct FfmpegSchroEncoderParams {
+typedef struct SchroEncoderParams {
/** Schroedinger video format */
SchroVideoFormat *format;
int enc_buf_size;
/** queue storing encoded frames */
- FfmpegDiracSchroQueue enc_frame_queue;
+ DiracSchroQueue enc_frame_queue;
/** end of sequence signalled */
int eos_signalled;
/** end of sequence pulled */
int eos_pulled;
-} FfmpegSchroEncoderParams;
+} SchroEncoderParams;
/**
* Works out Schro-compatible chroma format.
*/
static int SetSchroChromaFormat(AVCodecContext *avccontext)
{
- int num_formats = sizeof(ffmpeg_schro_pixel_format_map) /
- sizeof(ffmpeg_schro_pixel_format_map[0]);
+ int num_formats = sizeof(schro_pixel_format_map) /
+ sizeof(schro_pixel_format_map[0]);
int idx;
- FfmpegSchroEncoderParams* p_schro_params = avccontext->priv_data;
+ SchroEncoderParams *p_schro_params = avccontext->priv_data;
for (idx = 0; idx < num_formats; ++idx) {
- if (ffmpeg_schro_pixel_format_map[idx].ff_pix_fmt ==
+ if (schro_pixel_format_map[idx].ff_pix_fmt ==
avccontext->pix_fmt) {
p_schro_params->format->chroma_format =
- ffmpeg_schro_pixel_format_map[idx].schro_pix_fmt;
+ schro_pixel_format_map[idx].schro_pix_fmt;
return 0;
}
}
static int libschroedinger_encode_init(AVCodecContext *avccontext)
{
- FfmpegSchroEncoderParams* p_schro_params = avccontext->priv_data;
+ SchroEncoderParams *p_schro_params = avccontext->priv_data;
SchroVideoFormatEnum preset;
/* Initialize the libraries that libschroedinger depends on. */
if (SetSchroChromaFormat(avccontext) == -1)
return -1;
+ if (avccontext->color_primaries == AVCOL_PRI_BT709) {
+ p_schro_params->format->colour_primaries = SCHRO_COLOUR_PRIMARY_HDTV;
+ } else if (avccontext->color_primaries == AVCOL_PRI_BT470BG) {
+ p_schro_params->format->colour_primaries = SCHRO_COLOUR_PRIMARY_SDTV_625;
+ } else if (avccontext->color_primaries == AVCOL_PRI_SMPTE170M) {
+ p_schro_params->format->colour_primaries = SCHRO_COLOUR_PRIMARY_SDTV_525;
+ }
+
+ if (avccontext->colorspace == AVCOL_SPC_BT709) {
+ p_schro_params->format->colour_matrix = SCHRO_COLOUR_MATRIX_HDTV;
+ } else if (avccontext->colorspace == AVCOL_SPC_BT470BG) {
+ p_schro_params->format->colour_matrix = SCHRO_COLOUR_MATRIX_SDTV;
+ }
+
+ if (avccontext->color_trc == AVCOL_TRC_BT709) {
+ p_schro_params->format->transfer_function = SCHRO_TRANSFER_CHAR_TV_GAMMA;
+ }
+
if (ff_get_schro_frame_format(p_schro_params->format->chroma_format,
&p_schro_params->frame_format) == -1) {
av_log(avccontext, AV_LOG_ERROR,
"enable_noarith", 1);
} else {
schro_encoder_setting_set_double(p_schro_params->encoder,
- "gop_structure",
- SCHRO_ENCODER_GOP_BIREF);
+ "au_distance", avccontext->gop_size);
avccontext->has_b_frames = 1;
}
"rate_control",
SCHRO_ENCODER_RATE_CONTROL_LOSSLESS);
} else {
- int noise_threshold;
+ int quality;
schro_encoder_setting_set_double(p_schro_params->encoder,
"rate_control",
- SCHRO_ENCODER_RATE_CONTROL_CONSTANT_NOISE_THRESHOLD);
+ SCHRO_ENCODER_RATE_CONTROL_CONSTANT_QUALITY);
- noise_threshold = avccontext->global_quality / FF_QP2LAMBDA;
- if (noise_threshold > 100)
- noise_threshold = 100;
+ quality = avccontext->global_quality / FF_QP2LAMBDA;
+ if (quality > 10)
+ quality = 10;
schro_encoder_setting_set_double(p_schro_params->encoder,
- "noise_threshold",
- noise_threshold);
+ "quality", quality);
}
} else {
schro_encoder_setting_set_double(p_schro_params->encoder,
schro_encoder_setting_set_double(p_schro_params->encoder,
"interlaced_coding", 1);
+ schro_encoder_setting_set_double(p_schro_params->encoder, "open_gop",
+ !(avccontext->flags & CODEC_FLAG_CLOSED_GOP));
+
/* FIXME: Signal range hardcoded to 8-bit data until both libschroedinger
* and libdirac support other bit-depth data. */
schro_video_format_set_std_signal_range(p_schro_params->format,
static SchroFrame *libschroedinger_frame_from_data(AVCodecContext *avccontext,
void *in_data)
{
- FfmpegSchroEncoderParams* p_schro_params = avccontext->priv_data;
+ SchroEncoderParams *p_schro_params = avccontext->priv_data;
SchroFrame *in_frame;
/* Input line size may differ from what the codec supports. Especially
* when transcoding from one format to another. So use avpicture_layout
static void SchroedingerFreeFrame(void *data)
{
- FfmpegDiracSchroEncodedFrame *enc_frame = data;
+ DiracSchroEncodedFrame *enc_frame = data;
- av_freep(&(enc_frame->p_encbuf));
+ av_freep(&enc_frame->p_encbuf);
av_free(enc_frame);
}
int buf_size, void *data)
{
int enc_size = 0;
- FfmpegSchroEncoderParams* p_schro_params = avccontext->priv_data;
+ SchroEncoderParams *p_schro_params = avccontext->priv_data;
SchroEncoder *encoder = p_schro_params->encoder;
- struct FfmpegDiracSchroEncodedFrame* p_frame_output = NULL;
+ struct DiracSchroEncodedFrame *p_frame_output = NULL;
int go = 1;
SchroBuffer *enc_buf;
int presentation_frame;
}
/* Create output frame. */
- p_frame_output = av_mallocz(sizeof(FfmpegDiracSchroEncodedFrame));
+ p_frame_output = av_mallocz(sizeof(DiracSchroEncodedFrame));
/* Set output data. */
p_frame_output->size = p_schro_params->enc_buf_size;
p_frame_output->p_encbuf = p_schro_params->enc_buf;
/* Parse the coded frame number from the bitstream. Bytes 14
* through 17 represesent the frame number. */
- p_frame_output->frame_num = (enc_buf->data[13] << 24) +
- (enc_buf->data[14] << 16) +
- (enc_buf->data[15] << 8) +
- enc_buf->data[16];
+ p_frame_output->frame_num = AV_RB32(enc_buf->data + 13);
ff_dirac_schro_queue_push_back(&p_schro_params->enc_frame_queue,
p_frame_output);
static int libschroedinger_encode_close(AVCodecContext *avccontext)
{
-
- FfmpegSchroEncoderParams* p_schro_params = avccontext->priv_data;
+ SchroEncoderParams *p_schro_params = avccontext->priv_data;
/* Close the encoder. */
schro_encoder_free(p_schro_params->encoder);
}
-AVCodec libschroedinger_encoder = {
- "libschroedinger",
- AVMEDIA_TYPE_VIDEO,
- CODEC_ID_DIRAC,
- sizeof(FfmpegSchroEncoderParams),
- libschroedinger_encode_init,
- libschroedinger_encode_frame,
- libschroedinger_encode_close,
+AVCodec ff_libschroedinger_encoder = {
+ .name = "libschroedinger",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_DIRAC,
+ .priv_data_size = sizeof(SchroEncoderParams),
+ .init = libschroedinger_encode_init,
+ .encode = libschroedinger_encode_frame,
+ .close = libschroedinger_encode_close,
.capabilities = CODEC_CAP_DELAY,
.pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("libschroedinger Dirac 2.2"),