2 * Dirac encoder support via Schroedinger libraries
3 * Copyright (c) 2008 BBC, Anuradha Suraparaju <asuraparaju at gmail dot com >
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * Dirac encoder support via libschroedinger-1.0 libraries. More details about
25 * the Schroedinger project can be found at http://www.diracvideo.org/.
26 * The library implements Dirac Specification Version 2.2
27 * (http://dirac.sourceforge.net/specification.html).
30 #include <schroedinger/schro.h>
31 #include <schroedinger/schrodebug.h>
32 #include <schroedinger/schrovideoformat.h>
34 #include "libavutil/attributes.h"
35 #include "libavutil/avassert.h"
36 #include "libavutil/imgutils.h"
40 #include "libschroedinger.h"
41 #include "bytestream.h"
44 /** libschroedinger encoder private data */
45 typedef struct SchroEncoderParams {
46 /** Schroedinger video format */
47 SchroVideoFormat *format;
49 /** Schroedinger frame format */
50 SchroFrameFormat frame_format;
55 /** Schroedinger encoder handle*/
56 SchroEncoder* encoder;
58 /** buffer to store encoder output before writing it to the frame queue*/
59 unsigned char *enc_buf;
61 /** Size of encoder buffer*/
64 /** queue storing encoded frames */
65 FFSchroQueue enc_frame_queue;
67 /** end of sequence signalled */
70 /** end of sequence pulled */
73 /* counter for frames submitted to encoder, used as dts */
78 * Works out Schro-compatible chroma format.
80 static int set_chroma_format(AVCodecContext *avctx)
82 int num_formats = sizeof(schro_pixel_format_map) /
83 sizeof(schro_pixel_format_map[0]);
86 SchroEncoderParams *p_schro_params = avctx->priv_data;
88 for (idx = 0; idx < num_formats; ++idx) {
89 if (schro_pixel_format_map[idx].ff_pix_fmt == avctx->pix_fmt) {
90 p_schro_params->format->chroma_format =
91 schro_pixel_format_map[idx].schro_pix_fmt;
96 av_log(avctx, AV_LOG_ERROR,
97 "This codec currently only supports planar YUV 4:2:0, 4:2:2"
98 " and 4:4:4 formats.\n");
103 static av_cold int libschroedinger_encode_init(AVCodecContext *avctx)
105 SchroEncoderParams *p_schro_params = avctx->priv_data;
106 SchroVideoFormatEnum preset;
108 /* Initialize the libraries that libschroedinger depends on. */
111 /* Create an encoder object. */
112 p_schro_params->encoder = schro_encoder_new();
114 if (!p_schro_params->encoder) {
115 av_log(avctx, AV_LOG_ERROR,
116 "Unrecoverable Error: schro_encoder_new failed. ");
120 /* Initialize the format. */
121 preset = ff_get_schro_video_format_preset(avctx);
122 p_schro_params->format =
123 schro_encoder_get_video_format(p_schro_params->encoder);
124 schro_video_format_set_std_video_format(p_schro_params->format, preset);
125 p_schro_params->format->width = avctx->width;
126 p_schro_params->format->height = avctx->height;
128 if (set_chroma_format(avctx) == -1)
131 if (avctx->color_primaries == AVCOL_PRI_BT709) {
132 p_schro_params->format->colour_primaries = SCHRO_COLOUR_PRIMARY_HDTV;
133 } else if (avctx->color_primaries == AVCOL_PRI_BT470BG) {
134 p_schro_params->format->colour_primaries = SCHRO_COLOUR_PRIMARY_SDTV_625;
135 } else if (avctx->color_primaries == AVCOL_PRI_SMPTE170M) {
136 p_schro_params->format->colour_primaries = SCHRO_COLOUR_PRIMARY_SDTV_525;
139 if (avctx->colorspace == AVCOL_SPC_BT709) {
140 p_schro_params->format->colour_matrix = SCHRO_COLOUR_MATRIX_HDTV;
141 } else if (avctx->colorspace == AVCOL_SPC_BT470BG) {
142 p_schro_params->format->colour_matrix = SCHRO_COLOUR_MATRIX_SDTV;
145 if (avctx->color_trc == AVCOL_TRC_BT709) {
146 p_schro_params->format->transfer_function = SCHRO_TRANSFER_CHAR_TV_GAMMA;
149 if (ff_get_schro_frame_format(p_schro_params->format->chroma_format,
150 &p_schro_params->frame_format) == -1) {
151 av_log(avctx, AV_LOG_ERROR,
152 "This codec currently supports only planar YUV 4:2:0, 4:2:2"
153 " and 4:4:4 formats.\n");
157 p_schro_params->format->frame_rate_numerator = avctx->time_base.den;
158 p_schro_params->format->frame_rate_denominator = avctx->time_base.num;
160 p_schro_params->frame_size = av_image_get_buffer_size(avctx->pix_fmt,
164 if (!avctx->gop_size) {
165 schro_encoder_setting_set_double(p_schro_params->encoder,
167 SCHRO_ENCODER_GOP_INTRA_ONLY);
169 if (avctx->coder_type == FF_CODER_TYPE_VLC)
170 schro_encoder_setting_set_double(p_schro_params->encoder,
171 "enable_noarith", 1);
173 schro_encoder_setting_set_double(p_schro_params->encoder,
174 "au_distance", avctx->gop_size);
175 avctx->has_b_frames = 1;
176 p_schro_params->dts = -1;
179 /* FIXME - Need to handle SCHRO_ENCODER_RATE_CONTROL_LOW_DELAY. */
180 if (avctx->flags & AV_CODEC_FLAG_QSCALE) {
181 if (!avctx->global_quality) {
182 /* lossless coding */
183 schro_encoder_setting_set_double(p_schro_params->encoder,
185 SCHRO_ENCODER_RATE_CONTROL_LOSSLESS);
188 schro_encoder_setting_set_double(p_schro_params->encoder,
190 SCHRO_ENCODER_RATE_CONTROL_CONSTANT_QUALITY);
192 quality = avctx->global_quality / FF_QP2LAMBDA;
195 schro_encoder_setting_set_double(p_schro_params->encoder,
199 schro_encoder_setting_set_double(p_schro_params->encoder,
201 SCHRO_ENCODER_RATE_CONTROL_CONSTANT_BITRATE);
203 schro_encoder_setting_set_double(p_schro_params->encoder,
204 "bitrate", avctx->bit_rate);
207 if (avctx->flags & AV_CODEC_FLAG_INTERLACED_ME)
208 /* All material can be coded as interlaced or progressive
209 irrespective of the type of source material. */
210 schro_encoder_setting_set_double(p_schro_params->encoder,
211 "interlaced_coding", 1);
213 schro_encoder_setting_set_double(p_schro_params->encoder, "open_gop",
214 !(avctx->flags & AV_CODEC_FLAG_CLOSED_GOP));
216 /* FIXME: Signal range hardcoded to 8-bit data until both libschroedinger
217 * and libdirac support other bit-depth data. */
218 schro_video_format_set_std_signal_range(p_schro_params->format,
219 SCHRO_SIGNAL_RANGE_8BIT_VIDEO);
221 /* Set the encoder format. */
222 schro_encoder_set_video_format(p_schro_params->encoder,
223 p_schro_params->format);
225 /* Set the debug level. */
226 schro_debug_set_level(avctx->debug);
228 schro_encoder_start(p_schro_params->encoder);
230 /* Initialize the encoded frame queue. */
231 ff_schro_queue_init(&p_schro_params->enc_frame_queue);
235 static SchroFrame *libschroedinger_frame_from_data(AVCodecContext *avctx,
236 const AVFrame *frame)
238 SchroEncoderParams *p_schro_params = avctx->priv_data;
239 SchroFrame *in_frame = ff_create_schro_frame(avctx,
240 p_schro_params->frame_format);
243 /* Copy input data to SchroFrame buffers (they match the ones
244 * referenced by the AVFrame stored in priv) */
245 if (av_frame_copy(in_frame->priv, frame) < 0) {
246 av_log(avctx, AV_LOG_ERROR, "Failed to copy input data\n");
254 static void libschroedinger_free_frame(void *data)
256 FFSchroEncodedFrame *enc_frame = data;
258 av_freep(&enc_frame->p_encbuf);
262 static int libschroedinger_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
263 const AVFrame *frame, int *got_packet)
266 SchroEncoderParams *p_schro_params = avctx->priv_data;
267 SchroEncoder *encoder = p_schro_params->encoder;
268 struct FFSchroEncodedFrame *p_frame_output = NULL;
270 SchroBuffer *enc_buf;
271 int presentation_frame;
273 int last_frame_in_sequence = 0;
277 /* Push end of sequence if not already signalled. */
278 if (!p_schro_params->eos_signalled) {
279 schro_encoder_end_of_stream(encoder);
280 p_schro_params->eos_signalled = 1;
283 /* Allocate frame data to schro input buffer. */
284 SchroFrame *in_frame = libschroedinger_frame_from_data(avctx, frame);
286 return AVERROR(ENOMEM);
287 /* Load next frame. */
288 schro_encoder_push_frame(encoder, in_frame);
291 if (p_schro_params->eos_pulled)
294 /* Now check to see if we have any output from the encoder. */
297 SchroStateEnum state;
298 state = schro_encoder_wait(encoder);
300 case SCHRO_STATE_HAVE_BUFFER:
301 case SCHRO_STATE_END_OF_STREAM:
302 enc_buf = schro_encoder_pull(encoder, &presentation_frame);
303 if (enc_buf->length <= 0)
305 parse_code = enc_buf->data[4];
307 /* All non-frame data is prepended to actual frame data to
308 * be able to set the pts correctly. So we don't write data
309 * to the frame output queue until we actually have a frame
311 if ((err = av_reallocp(&p_schro_params->enc_buf,
312 p_schro_params->enc_buf_size +
313 enc_buf->length)) < 0) {
314 p_schro_params->enc_buf_size = 0;
318 memcpy(p_schro_params->enc_buf + p_schro_params->enc_buf_size,
319 enc_buf->data, enc_buf->length);
320 p_schro_params->enc_buf_size += enc_buf->length;
323 if (state == SCHRO_STATE_END_OF_STREAM) {
324 p_schro_params->eos_pulled = 1;
328 if (!SCHRO_PARSE_CODE_IS_PICTURE(parse_code)) {
329 schro_buffer_unref(enc_buf);
333 /* Create output frame. */
334 p_frame_output = av_mallocz(sizeof(FFSchroEncodedFrame));
336 return AVERROR(ENOMEM);
337 /* Set output data. */
338 p_frame_output->size = p_schro_params->enc_buf_size;
339 p_frame_output->p_encbuf = p_schro_params->enc_buf;
340 if (SCHRO_PARSE_CODE_IS_INTRA(parse_code) &&
341 SCHRO_PARSE_CODE_IS_REFERENCE(parse_code))
342 p_frame_output->key_frame = 1;
344 /* Parse the coded frame number from the bitstream. Bytes 14
345 * through 17 represesent the frame number. */
346 p_frame_output->frame_num = AV_RB32(enc_buf->data + 13);
348 ff_schro_queue_push_back(&p_schro_params->enc_frame_queue,
350 p_schro_params->enc_buf_size = 0;
351 p_schro_params->enc_buf = NULL;
353 schro_buffer_unref(enc_buf);
357 case SCHRO_STATE_NEED_FRAME:
361 case SCHRO_STATE_AGAIN:
365 av_log(avctx, AV_LOG_ERROR, "Unknown Schro Encoder state\n");
370 /* Copy 'next' frame in queue. */
372 if (p_schro_params->enc_frame_queue.size == 1 &&
373 p_schro_params->eos_pulled)
374 last_frame_in_sequence = 1;
376 p_frame_output = ff_schro_queue_pop(&p_schro_params->enc_frame_queue);
381 pkt_size = p_frame_output->size;
382 if (last_frame_in_sequence && p_schro_params->enc_buf_size > 0)
383 pkt_size += p_schro_params->enc_buf_size;
384 if ((ret = ff_alloc_packet2(avctx, pkt, pkt_size, 0)) < 0)
387 memcpy(pkt->data, p_frame_output->p_encbuf, p_frame_output->size);
388 #if FF_API_CODED_FRAME
389 FF_DISABLE_DEPRECATION_WARNINGS
390 avctx->coded_frame->key_frame = p_frame_output->key_frame;
391 avctx->coded_frame->pts = p_frame_output->frame_num;
392 FF_ENABLE_DEPRECATION_WARNINGS
394 /* Use the frame number of the encoded frame as the pts. It is OK to
395 * do so since Dirac is a constant frame rate codec. It expects input
396 * to be of constant frame rate. */
397 pkt->pts = p_frame_output->frame_num;
398 pkt->dts = p_schro_params->dts++;
399 enc_size = p_frame_output->size;
401 /* Append the end of sequence information to the last frame in the
403 if (last_frame_in_sequence && p_schro_params->enc_buf_size > 0) {
404 memcpy(pkt->data + enc_size, p_schro_params->enc_buf,
405 p_schro_params->enc_buf_size);
406 enc_size += p_schro_params->enc_buf_size;
407 av_freep(&p_schro_params->enc_buf);
408 p_schro_params->enc_buf_size = 0;
411 if (p_frame_output->key_frame)
412 pkt->flags |= AV_PKT_FLAG_KEY;
417 libschroedinger_free_frame(p_frame_output);
422 static int libschroedinger_encode_close(AVCodecContext *avctx)
424 SchroEncoderParams *p_schro_params = avctx->priv_data;
426 /* Close the encoder. */
427 schro_encoder_free(p_schro_params->encoder);
429 /* Free data in the output frame queue. */
430 ff_schro_queue_free(&p_schro_params->enc_frame_queue,
431 libschroedinger_free_frame);
434 /* Free the encoder buffer. */
435 if (p_schro_params->enc_buf_size)
436 av_freep(&p_schro_params->enc_buf);
438 /* Free the video format structure. */
439 av_freep(&p_schro_params->format);
445 AVCodec ff_libschroedinger_encoder = {
446 .name = "libschroedinger",
447 .long_name = NULL_IF_CONFIG_SMALL("libschroedinger Dirac 2.2"),
448 .type = AVMEDIA_TYPE_VIDEO,
449 .id = AV_CODEC_ID_DIRAC,
450 .priv_data_size = sizeof(SchroEncoderParams),
451 .init = libschroedinger_encode_init,
452 .encode2 = libschroedinger_encode_frame,
453 .close = libschroedinger_encode_close,
454 .capabilities = AV_CODEC_CAP_DELAY,
455 .pix_fmts = (const enum AVPixelFormat[]){
456 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_NONE