| /* |
| * libxevd decoder |
| * EVC (MPEG-5 Essential Video Coding) decoding using XEVD MPEG-5 EVC decoder library |
| * |
| * Copyright (C) 2021 Dawid Kozinski <d.kozinski@samsung.com> |
| * |
| * This file is part of FFmpeg. |
| * |
| * 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. |
| * |
| * 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 FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <stddef.h> |
| |
| #include <xevd.h> |
| |
| #include "libavutil/internal.h" |
| #include "libavutil/common.h" |
| #include "libavutil/pixdesc.h" |
| #include "libavutil/pixfmt.h" |
| #include "libavutil/imgutils.h" |
| #include "libavutil/cpu.h" |
| |
| #include "avcodec.h" |
| #include "codec_internal.h" |
| #include "profiles.h" |
| #include "decode.h" |
| |
| #define XEVD_PARAM_BAD_NAME -1 |
| #define XEVD_PARAM_BAD_VALUE -2 |
| |
| #define EVC_NAL_HEADER_SIZE 2 /* byte */ |
| |
| /** |
| * The structure stores all the states associated with the instance of Xeve MPEG-5 EVC decoder |
| */ |
| typedef struct XevdContext { |
| XEVD id; // XEVD instance identifier @see xevd.h |
| XEVD_CDSC cdsc; // decoding parameters @see xevd.h |
| |
| // If end of stream occurs it is required "flushing" (aka draining) the codec, |
| // as the codec might buffer multiple frames or packets internally. |
| int draining_mode; // The flag is set if codec enters draining mode. |
| |
| AVPacket *pkt; // access unit (a set of NAL units that are consecutive in decoding order and containing exactly one encoded image) |
| } XevdContext; |
| |
| /** |
| * The function populates the XEVD_CDSC structure. |
| * XEVD_CDSC contains all decoder parameters that should be initialized before its use. |
| * |
| * @param[in] avctx codec context |
| * @param[out] cdsc contains all decoder parameters that should be initialized before its use |
| * |
| */ |
| static void get_conf(AVCodecContext *avctx, XEVD_CDSC *cdsc) |
| { |
| int cpu_count = av_cpu_count(); |
| |
| /* clear XEVS_CDSC structure */ |
| memset(cdsc, 0, sizeof(XEVD_CDSC)); |
| |
| /* init XEVD_CDSC */ |
| if (avctx->thread_count <= 0) |
| cdsc->threads = (cpu_count < XEVD_MAX_TASK_CNT) ? cpu_count : XEVD_MAX_TASK_CNT; |
| else if (avctx->thread_count > XEVD_MAX_TASK_CNT) |
| cdsc->threads = XEVD_MAX_TASK_CNT; |
| else |
| cdsc->threads = avctx->thread_count; |
| } |
| |
| /** |
| * Read NAL unit length |
| * @param bs input data (bitstream) |
| * @return the length of NAL unit on success, 0 value on failure |
| */ |
| static uint32_t read_nal_unit_length(const uint8_t *bs, int bs_size, AVCodecContext *avctx) |
| { |
| uint32_t len = 0; |
| XEVD_INFO info; |
| int ret; |
| |
| if (bs_size == XEVD_NAL_UNIT_LENGTH_BYTE) { |
| ret = xevd_info((void *)bs, XEVD_NAL_UNIT_LENGTH_BYTE, 1, &info); |
| if (XEVD_FAILED(ret)) { |
| av_log(avctx, AV_LOG_ERROR, "Cannot get bitstream information\n"); |
| return 0; |
| } |
| len = info.nalu_len; |
| if (len == 0) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid bitstream size! [%d]\n", bs_size); |
| return 0; |
| } |
| } |
| |
| return len; |
| } |
| |
| /** |
| * @param[in] xectx the structure that stores all the state associated with the instance of Xeve MPEG-5 EVC decoder |
| * @param[out] avctx codec context |
| * @return 0 on success, negative value on failure |
| */ |
| static int export_stream_params(const XevdContext *xectx, AVCodecContext *avctx) |
| { |
| int ret; |
| int size; |
| int color_space; |
| |
| avctx->pix_fmt = AV_PIX_FMT_YUV420P10; |
| |
| size = 4; |
| ret = xevd_config(xectx->id, XEVD_CFG_GET_CODED_WIDTH, &avctx->coded_width, &size); |
| if (XEVD_FAILED(ret)) { |
| av_log(avctx, AV_LOG_ERROR, "Failed to get coded_width\n"); |
| return AVERROR_EXTERNAL; |
| } |
| |
| ret = xevd_config(xectx->id, XEVD_CFG_GET_CODED_HEIGHT, &avctx->coded_height, &size); |
| if (XEVD_FAILED(ret)) { |
| av_log(avctx, AV_LOG_ERROR, "Failed to get coded_height\n"); |
| return AVERROR_EXTERNAL; |
| } |
| |
| ret = xevd_config(xectx->id, XEVD_CFG_GET_WIDTH, &avctx->width, &size); |
| if (XEVD_FAILED(ret)) { |
| av_log(avctx, AV_LOG_ERROR, "Failed to get width\n"); |
| return AVERROR_EXTERNAL; |
| } |
| |
| ret = xevd_config(xectx->id, XEVD_CFG_GET_HEIGHT, &avctx->height, &size); |
| if (XEVD_FAILED(ret)) { |
| av_log(avctx, AV_LOG_ERROR, "Failed to get height\n"); |
| return AVERROR_EXTERNAL; |
| } |
| |
| ret = xevd_config(xectx->id, XEVD_CFG_GET_COLOR_SPACE, &color_space, &size); |
| if (XEVD_FAILED(ret)) { |
| av_log(avctx, AV_LOG_ERROR, "Failed to get color_space\n"); |
| return AVERROR_EXTERNAL; |
| } |
| switch(color_space) { |
| case XEVD_CS_YCBCR400_10LE: |
| avctx->pix_fmt = AV_PIX_FMT_GRAY10LE; |
| break; |
| case XEVD_CS_YCBCR420_10LE: |
| avctx->pix_fmt = AV_PIX_FMT_YUV420P10LE; |
| break; |
| case XEVD_CS_YCBCR422_10LE: |
| avctx->pix_fmt = AV_PIX_FMT_YUV422P10LE; |
| break; |
| case XEVD_CS_YCBCR444_10LE: |
| avctx->pix_fmt = AV_PIX_FMT_YUV444P10LE; |
| break; |
| default: |
| av_log(avctx, AV_LOG_ERROR, "Unknown color space\n"); |
| avctx->pix_fmt = AV_PIX_FMT_NONE; |
| return AVERROR_INVALIDDATA; |
| } |
| |
| // the function returns sps->num_reorder_pics |
| ret = xevd_config(xectx->id, XEVD_CFG_GET_MAX_CODING_DELAY, &avctx->has_b_frames, &size); |
| if (XEVD_FAILED(ret)) { |
| av_log(avctx, AV_LOG_ERROR, "Failed to get max_coding_delay\n"); |
| return AVERROR_EXTERNAL; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * @brief Copy image in imgb to frame. |
| * |
| * @param avctx codec context |
| * @param[in] imgb |
| * @param[out] frame |
| * @return 0 on success, negative value on failure |
| */ |
| static int libxevd_image_copy(struct AVCodecContext *avctx, XEVD_IMGB *imgb, struct AVFrame *frame) |
| { |
| int ret; |
| if (imgb->cs != XEVD_CS_YCBCR420_10LE) { |
| av_log(avctx, AV_LOG_ERROR, "Not supported pixel format: %s\n", av_get_pix_fmt_name(avctx->pix_fmt)); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (imgb->w[0] != avctx->width || imgb->h[0] != avctx->height) { // stream resolution changed |
| if (ff_set_dimensions(avctx, imgb->w[0], imgb->h[0]) < 0) { |
| av_log(avctx, AV_LOG_ERROR, "Cannot set new dimension\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| |
| ret = ff_get_buffer(avctx, frame, 0); |
| if (ret < 0) |
| return ret; |
| |
| av_image_copy(frame->data, frame->linesize, (const uint8_t **)imgb->a, |
| imgb->s, avctx->pix_fmt, |
| imgb->w[0], imgb->h[0]); |
| |
| return 0; |
| } |
| |
| /** |
| * Initialize decoder |
| * Create a decoder instance and allocate all the needed resources |
| * |
| * @param avctx codec context |
| * @return 0 on success, negative error code on failure |
| */ |
| static av_cold int libxevd_init(AVCodecContext *avctx) |
| { |
| XevdContext *xectx = avctx->priv_data; |
| XEVD_CDSC *cdsc = &(xectx->cdsc); |
| |
| /* read configurations and set values for created descriptor (XEVD_CDSC) */ |
| get_conf(avctx, cdsc); |
| |
| /* create decoder */ |
| xectx->id = xevd_create(&(xectx->cdsc), NULL); |
| if (xectx->id == NULL) { |
| av_log(avctx, AV_LOG_ERROR, "Cannot create XEVD encoder\n"); |
| return AVERROR_EXTERNAL; |
| } |
| |
| xectx->draining_mode = 0; |
| xectx->pkt = av_packet_alloc(); |
| if (!xectx->pkt) { |
| av_log(avctx, AV_LOG_ERROR, "Cannot allocate memory for AVPacket\n"); |
| return AVERROR(ENOMEM); |
| } |
| |
| return 0; |
| } |
| |
| static int libxevd_return_frame(AVCodecContext *avctx, AVFrame *frame, |
| XEVD_IMGB *imgb, AVPacket **pkt_au) |
| { |
| AVPacket *pkt_au_imgb = (AVPacket*)imgb->pdata[0]; |
| int ret; |
| |
| if (!pkt_au_imgb) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid data needed to fill frame properties\n"); |
| |
| if (pkt_au) |
| av_packet_free(pkt_au); |
| av_frame_unref(frame); |
| |
| imgb->release(imgb); |
| imgb = NULL; |
| |
| return AVERROR_INVALIDDATA; |
| } |
| |
| // got frame |
| ret = libxevd_image_copy(avctx, imgb, frame); |
| if (ret < 0) { |
| av_log(avctx, AV_LOG_ERROR, "Image copying error\n"); |
| |
| av_packet_free(&pkt_au_imgb); |
| av_frame_unref(frame); |
| |
| imgb->release(imgb); |
| imgb = NULL; |
| |
| return ret; |
| } |
| |
| // use ff_decode_frame_props_from_pkt() to fill frame properties |
| ret = ff_decode_frame_props_from_pkt(avctx, frame, pkt_au_imgb); |
| if (ret < 0) { |
| av_log(avctx, AV_LOG_ERROR, "ff_decode_frame_props_from_pkt error\n"); |
| |
| av_packet_free(&pkt_au_imgb); |
| av_frame_unref(frame); |
| |
| imgb->release(imgb); |
| imgb = NULL; |
| |
| return ret; |
| } |
| |
| frame->pkt_dts = imgb->ts[XEVD_TS_DTS]; |
| frame->pts = imgb->ts[XEVD_TS_PTS]; |
| |
| av_packet_free(&pkt_au_imgb); |
| |
| // xevd_pull uses pool of objects of type XEVD_IMGB. |
| // The pool size is equal MAX_PB_SIZE (26), so release object when it is no more needed |
| imgb->release(imgb); |
| imgb = NULL; |
| |
| return 0; |
| } |
| /** |
| * Decode frame with decoupled packet/frame dataflow |
| * |
| * @param avctx codec context |
| * @param[out] frame decoded frame |
| * |
| * @return 0 on success, negative error code on failure |
| */ |
| static int libxevd_receive_frame(AVCodecContext *avctx, AVFrame *frame) |
| { |
| XevdContext *xectx = avctx->priv_data; |
| AVPacket *pkt = xectx->pkt; |
| XEVD_IMGB *imgb = NULL; |
| |
| int xevd_ret = 0; |
| int ret = 0; |
| |
| // obtain access unit (input data) - a set of NAL units that are consecutive in decoding order and containing exactly one encoded image |
| ret = ff_decode_get_packet(avctx, pkt); |
| if (ret < 0 && ret != AVERROR_EOF) { |
| av_packet_unref(pkt); |
| |
| return ret; |
| } else if(ret == AVERROR_EOF && xectx->draining_mode == 0) { // End of stream situations. Enter draining mode |
| |
| xectx->draining_mode = 1; |
| av_packet_unref(pkt); |
| } |
| |
| if (pkt->size > 0) { |
| int bs_read_pos = 0; |
| XEVD_STAT stat; |
| XEVD_BITB bitb; |
| int nalu_size; |
| AVPacket *pkt_au = av_packet_alloc(); |
| imgb = NULL; |
| |
| if (!pkt_au) { |
| av_packet_unref(pkt); |
| return AVERROR(ENOMEM); |
| } |
| FFSWAP(AVPacket*, pkt_au, xectx->pkt); |
| |
| // get all nal units from AU |
| while(pkt_au->size > (bs_read_pos + XEVD_NAL_UNIT_LENGTH_BYTE)) { |
| memset(&stat, 0, sizeof(XEVD_STAT)); |
| |
| nalu_size = read_nal_unit_length(pkt_au->data + bs_read_pos, XEVD_NAL_UNIT_LENGTH_BYTE, avctx); |
| if (nalu_size == 0) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid bitstream\n"); |
| av_packet_free(&pkt_au); |
| ret = AVERROR_INVALIDDATA; |
| |
| return ret; |
| } |
| bs_read_pos += XEVD_NAL_UNIT_LENGTH_BYTE; |
| |
| bitb.addr = pkt_au->data + bs_read_pos; |
| bitb.ssize = nalu_size; |
| bitb.pdata[0] = pkt_au; |
| bitb.ts[XEVD_TS_DTS] = pkt_au->dts; |
| |
| /* main decoding block */ |
| xevd_ret = xevd_decode(xectx->id, &bitb, &stat); |
| if (XEVD_FAILED(xevd_ret)) { |
| av_log(avctx, AV_LOG_ERROR, "Failed to decode bitstream\n"); |
| av_packet_free(&pkt_au); |
| |
| return AVERROR_EXTERNAL; |
| } |
| |
| bs_read_pos += nalu_size; |
| |
| if (stat.nalu_type == XEVD_NUT_SPS) { // EVC stream parameters changed |
| if ((ret = export_stream_params(xectx, avctx)) != 0) { |
| av_log(avctx, AV_LOG_ERROR, "Failed to export stream params\n"); |
| av_packet_free(&pkt_au); |
| |
| return ret; |
| } |
| } |
| |
| if (stat.read != nalu_size) |
| av_log(avctx, AV_LOG_INFO, "Different reading of bitstream (in:%d, read:%d)\n,", nalu_size, stat.read); |
| |
| // stat.fnum - has negative value if the decoded data is not frame |
| if (stat.fnum >= 0) { |
| |
| xevd_ret = xevd_pull(xectx->id, &imgb); // The function returns a valid image only if the return code is XEVD_OK |
| |
| if (XEVD_FAILED(xevd_ret)) { |
| av_log(avctx, AV_LOG_ERROR, "Failed to pull the decoded image (xevd error code: %d, frame#=%d)\n", xevd_ret, stat.fnum); |
| |
| av_packet_free(&pkt_au); |
| |
| return AVERROR_EXTERNAL; |
| } else if (xevd_ret == XEVD_OK_FRM_DELAYED) { |
| if(bs_read_pos == pkt_au->size) { |
| return AVERROR(EAGAIN); |
| } |
| } else { // XEVD_OK |
| if (!imgb) { |
| if(bs_read_pos == pkt_au->size) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid decoded image data\n"); |
| |
| av_packet_free(&pkt_au); |
| return AVERROR(EAGAIN); |
| } |
| } else { |
| return libxevd_return_frame(avctx, frame, imgb, &pkt_au); |
| } |
| } |
| } |
| } |
| } else { // decoder draining mode handling |
| |
| xevd_ret = xevd_pull(xectx->id, &imgb); |
| |
| if (xevd_ret == XEVD_ERR_UNEXPECTED) { // draining process completed |
| av_log(avctx, AV_LOG_DEBUG, "Draining process completed\n"); |
| |
| return AVERROR_EOF; |
| } else if (XEVD_FAILED(xevd_ret)) { // handle all other errors |
| av_log(avctx, AV_LOG_ERROR, "Failed to pull the decoded image (xevd error code: %d)\n", xevd_ret); |
| |
| return AVERROR_EXTERNAL; |
| } else { // XEVD_OK |
| if (!imgb) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid decoded image data\n"); |
| |
| return AVERROR_EXTERNAL; |
| } |
| |
| return libxevd_return_frame(avctx, frame, imgb, NULL); |
| } |
| } |
| |
| return ret; |
| } |
| |
| /** |
| * Destroy decoder |
| * |
| * @param avctx codec context |
| * @return 0 on success |
| */ |
| static av_cold int libxevd_close(AVCodecContext *avctx) |
| { |
| XevdContext *xectx = avctx->priv_data; |
| if (xectx->id) { |
| xevd_delete(xectx->id); |
| xectx->id = NULL; |
| } |
| |
| xectx->draining_mode = 0; |
| av_packet_free(&xectx->pkt); |
| |
| return 0; |
| } |
| |
| const FFCodec ff_libxevd_decoder = { |
| .p.name = "evc", |
| CODEC_LONG_NAME("EVC / MPEG-5 Essential Video Coding (EVC)"), |
| .p.type = AVMEDIA_TYPE_VIDEO, |
| .p.id = AV_CODEC_ID_EVC, |
| .init = libxevd_init, |
| FF_CODEC_RECEIVE_FRAME_CB(libxevd_receive_frame), |
| .close = libxevd_close, |
| .priv_data_size = sizeof(XevdContext), |
| .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY | |
| AV_CODEC_CAP_OTHER_THREADS | AV_CODEC_CAP_AVOID_PROBING, |
| .p.profiles = NULL_IF_CONFIG_SMALL(ff_evc_profiles), |
| .p.wrapper_name = "libxevd", |
| .caps_internal = FF_CODEC_CAP_INIT_CLEANUP | FF_CODEC_CAP_NOT_INIT_THREADSAFE | |
| FF_CODEC_CAP_SETS_FRAME_PROPS, |
| }; |
