mirror of https://github.com/FFmpeg/FFmpeg.git
Paul B Mahol
6 years ago
parent
0067da587a
commit
7c0b3ba7dd
9 changed files with 208 additions and 2 deletions
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/*
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* Copyright (c) 2019 Paul B Mahol |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/intreadwrite.h" |
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#include "avcodec.h" |
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#include "internal.h" |
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typedef struct IMM5Context { |
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AVCodecContext *h264_avctx; // wrapper context for H264
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AVCodecContext *hevc_avctx; // wrapper context for HEVC
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} IMM5Context; |
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static const struct IMM5_unit { |
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uint8_t bits[14]; |
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uint8_t len; |
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} IMM5_units[14] = { |
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x0B, 0x0F, 0x88 }, 12 }, |
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x83, 0xE2 }, 12 }, |
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x81, 0xE8, 0x80 }, 13 }, |
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x0B, 0x04, 0xA2 }, 12 }, |
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x81, 0x28, 0x80 }, 13 }, |
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x80, 0x92, 0x20 }, 13 }, |
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x0B, 0x0F, 0xC8 }, 13 }, |
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x83, 0xF2 }, 13 }, |
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x81, 0xEC, 0x80 }, 14 }, |
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x0B, 0x04, 0xB2 }, 13 }, |
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x81, 0x2C, 0x80 }, 14 }, |
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{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x80, 0x93, 0x20 }, 14 }, |
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{ { 0x00, 0x00, 0x00, 0x01, 0x68, 0xDE, 0x3C, 0x80 }, 8 }, |
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{ { 0x00, 0x00, 0x00, 0x01, 0x68, 0xCE, 0x32, 0x28 }, 8 }, |
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}; |
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static av_cold int imm5_init(AVCodecContext *avctx) |
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{ |
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IMM5Context *ctx = avctx->priv_data; |
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const AVCodec *codec; |
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int ret; |
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codec = avcodec_find_decoder(AV_CODEC_ID_H264); |
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if (!codec) |
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return AVERROR_BUG; |
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ctx->h264_avctx = avcodec_alloc_context3(codec); |
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if (!ctx->h264_avctx) |
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return AVERROR(ENOMEM); |
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ctx->h264_avctx->thread_count = 1; |
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ctx->h264_avctx->flags = avctx->flags; |
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ctx->h264_avctx->flags2 = avctx->flags2; |
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ret = ff_codec_open2_recursive(ctx->h264_avctx, codec, NULL); |
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if (ret < 0) |
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return ret; |
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codec = avcodec_find_decoder(AV_CODEC_ID_HEVC); |
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if (!codec) |
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return AVERROR_BUG; |
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ctx->hevc_avctx = avcodec_alloc_context3(codec); |
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if (!ctx->hevc_avctx) |
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return AVERROR(ENOMEM); |
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ctx->hevc_avctx->thread_count = 1; |
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ctx->hevc_avctx->flags = avctx->flags; |
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ctx->hevc_avctx->flags2 = avctx->flags2; |
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ret = ff_codec_open2_recursive(ctx->hevc_avctx, codec, NULL); |
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if (ret < 0) |
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return ret; |
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return 0; |
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} |
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static int imm5_decode_frame(AVCodecContext *avctx, void *data, |
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int *got_frame, AVPacket *avpkt) |
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{ |
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IMM5Context *ctx = avctx->priv_data; |
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AVFrame *frame = data; |
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AVCodecContext *codec_avctx = ctx->h264_avctx; |
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int ret; |
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if (avpkt->size > 24 && avpkt->data[8] <= 1 && AV_RL32(avpkt->data + 4) + 24ULL <= avpkt->size) { |
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int codec_type = avpkt->data[1]; |
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int index = avpkt->data[10]; |
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int new_size = AV_RL32(avpkt->data + 4); |
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int offset, off; |
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if (codec_type == 0xA) { |
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codec_avctx = ctx->hevc_avctx; |
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} else if (index == 17) { |
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index = 4; |
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} else if (index == 18) { |
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index = 5; |
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} |
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if (index >= 1 && index <= 12) { |
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ret = av_packet_make_writable(avpkt); |
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if (ret < 0) |
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return ret; |
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index -= 1; |
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off = offset = IMM5_units[index].len; |
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if (codec_type == 2) { |
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offset += IMM5_units[12].len; |
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} else { |
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offset += IMM5_units[13].len; |
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} |
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avpkt->data += 24 - offset; |
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avpkt->size = new_size + offset; |
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memcpy(avpkt->data, IMM5_units[index].bits, IMM5_units[index].len); |
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if (codec_type == 2) { |
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memcpy(avpkt->data + off, IMM5_units[12].bits, IMM5_units[12].len); |
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} else { |
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memcpy(avpkt->data + off, IMM5_units[13].bits, IMM5_units[13].len); |
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} |
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} else { |
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avpkt->data += 24; |
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avpkt->size -= 24; |
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} |
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} |
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ret = avcodec_send_packet(codec_avctx, avpkt); |
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if (ret < 0) { |
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av_log(avctx, AV_LOG_ERROR, "Error submitting a packet for decoding\n"); |
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return ret; |
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} |
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ret = avcodec_receive_frame(codec_avctx, frame); |
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if (ret < 0) |
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return ret; |
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avctx->pix_fmt = codec_avctx->pix_fmt; |
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avctx->coded_width = codec_avctx->coded_width; |
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avctx->coded_height = codec_avctx->coded_height; |
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avctx->width = codec_avctx->width; |
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avctx->height = codec_avctx->height; |
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avctx->bit_rate = codec_avctx->bit_rate; |
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avctx->colorspace = codec_avctx->colorspace; |
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avctx->color_range = codec_avctx->color_range; |
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avctx->color_trc = codec_avctx->color_trc; |
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avctx->color_primaries = codec_avctx->color_primaries; |
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avctx->chroma_sample_location = codec_avctx->chroma_sample_location; |
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*got_frame = 1; |
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return avpkt->size; |
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} |
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static void imm5_flush(AVCodecContext *avctx) |
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{ |
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IMM5Context *ctx = avctx->priv_data; |
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avcodec_flush_buffers(ctx->h264_avctx); |
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avcodec_flush_buffers(ctx->hevc_avctx); |
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} |
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static av_cold int imm5_close(AVCodecContext *avctx) |
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{ |
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IMM5Context *ctx = avctx->priv_data; |
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avcodec_free_context(&ctx->h264_avctx); |
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avcodec_free_context(&ctx->hevc_avctx); |
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return 0; |
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} |
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AVCodec ff_imm5_decoder = { |
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.name = "imm5", |
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.long_name = NULL_IF_CONFIG_SMALL("Infinity IMM5"), |
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.type = AVMEDIA_TYPE_VIDEO, |
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.id = AV_CODEC_ID_IMM5, |
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.init = imm5_init, |
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.decode = imm5_decode_frame, |
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.close = imm5_close, |
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.flush = imm5_flush, |
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.priv_data_size = sizeof(IMM5Context), |
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | |
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FF_CODEC_CAP_INIT_CLEANUP, |
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}; |
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