/* * generic decoding-related code * * 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 #include #include "config.h" #if CONFIG_ICONV # include #endif #include "libavutil/avassert.h" #include "libavutil/avstring.h" #include "libavutil/bprint.h" #include "libavutil/channel_layout.h" #include "libavutil/common.h" #include "libavutil/fifo.h" #include "libavutil/frame.h" #include "libavutil/hwcontext.h" #include "libavutil/imgutils.h" #include "libavutil/internal.h" #include "libavutil/intmath.h" #include "libavutil/opt.h" #include "avcodec.h" #include "avcodec_internal.h" #include "bytestream.h" #include "bsf.h" #include "codec_internal.h" #include "decode.h" #include "hwconfig.h" #include "internal.h" #include "packet_internal.h" #include "thread.h" typedef struct DecodeContext { AVCodecInternal avci; /* to prevent infinite loop on errors when draining */ int nb_draining_errors; /** * The caller has submitted a NULL packet on input. */ int draining_started; } DecodeContext; static DecodeContext *decode_ctx(AVCodecInternal *avci) { return (DecodeContext *)avci; } static int apply_param_change(AVCodecContext *avctx, const AVPacket *avpkt) { int ret; size_t size; const uint8_t *data; uint32_t flags; int64_t val; data = av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, &size); if (!data) return 0; if (!(avctx->codec->capabilities & AV_CODEC_CAP_PARAM_CHANGE)) { av_log(avctx, AV_LOG_ERROR, "This decoder does not support parameter " "changes, but PARAM_CHANGE side data was sent to it.\n"); ret = AVERROR(EINVAL); goto fail2; } if (size < 4) goto fail; flags = bytestream_get_le32(&data); size -= 4; #if FF_API_OLD_CHANNEL_LAYOUT FF_DISABLE_DEPRECATION_WARNINGS if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) { if (size < 4) goto fail; val = bytestream_get_le32(&data); if (val <= 0 || val > INT_MAX) { av_log(avctx, AV_LOG_ERROR, "Invalid channel count"); ret = AVERROR_INVALIDDATA; goto fail2; } av_channel_layout_uninit(&avctx->ch_layout); avctx->ch_layout.nb_channels = val; avctx->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC; size -= 4; } if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) { if (size < 8) goto fail; av_channel_layout_uninit(&avctx->ch_layout); ret = av_channel_layout_from_mask(&avctx->ch_layout, bytestream_get_le64(&data)); if (ret < 0) goto fail2; size -= 8; } if (flags & (AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT | AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT)) { avctx->channels = avctx->ch_layout.nb_channels; avctx->channel_layout = (avctx->ch_layout.order == AV_CHANNEL_ORDER_NATIVE) ? avctx->ch_layout.u.mask : 0; } FF_ENABLE_DEPRECATION_WARNINGS #endif if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) { if (size < 4) goto fail; val = bytestream_get_le32(&data); if (val <= 0 || val > INT_MAX) { av_log(avctx, AV_LOG_ERROR, "Invalid sample rate"); ret = AVERROR_INVALIDDATA; goto fail2; } avctx->sample_rate = val; size -= 4; } if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) { if (size < 8) goto fail; avctx->width = bytestream_get_le32(&data); avctx->height = bytestream_get_le32(&data); size -= 8; ret = ff_set_dimensions(avctx, avctx->width, avctx->height); if (ret < 0) goto fail2; } return 0; fail: av_log(avctx, AV_LOG_ERROR, "PARAM_CHANGE side data too small.\n"); ret = AVERROR_INVALIDDATA; fail2: if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "Error applying parameter changes.\n"); if (avctx->err_recognition & AV_EF_EXPLODE) return ret; } return 0; } static int extract_packet_props(AVCodecInternal *avci, const AVPacket *pkt) { int ret = 0; av_packet_unref(avci->last_pkt_props); if (pkt) { ret = av_packet_copy_props(avci->last_pkt_props, pkt); #if FF_API_FRAME_PKT if (!ret) avci->last_pkt_props->stream_index = pkt->size; // Needed for ff_decode_frame_props(). #endif } return ret; } static int decode_bsfs_init(AVCodecContext *avctx) { AVCodecInternal *avci = avctx->internal; const FFCodec *const codec = ffcodec(avctx->codec); int ret; if (avci->bsf) return 0; ret = av_bsf_list_parse_str(codec->bsfs, &avci->bsf); if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "Error parsing decoder bitstream filters '%s': %s\n", codec->bsfs, av_err2str(ret)); if (ret != AVERROR(ENOMEM)) ret = AVERROR_BUG; goto fail; } /* We do not currently have an API for passing the input timebase into decoders, * but no filters used here should actually need it. * So we make up some plausible-looking number (the MPEG 90kHz timebase) */ avci->bsf->time_base_in = (AVRational){ 1, 90000 }; ret = avcodec_parameters_from_context(avci->bsf->par_in, avctx); if (ret < 0) goto fail; ret = av_bsf_init(avci->bsf); if (ret < 0) goto fail; return 0; fail: av_bsf_free(&avci->bsf); return ret; } static int decode_get_packet(AVCodecContext *avctx, AVPacket *pkt) { AVCodecInternal *avci = avctx->internal; int ret; ret = av_bsf_receive_packet(avci->bsf, pkt); if (ret == AVERROR_EOF) avci->draining = 1; if (ret < 0) return ret; if (!(ffcodec(avctx->codec)->caps_internal & FF_CODEC_CAP_SETS_FRAME_PROPS)) { ret = extract_packet_props(avctx->internal, pkt); if (ret < 0) goto finish; } ret = apply_param_change(avctx, pkt); if (ret < 0) goto finish; return 0; finish: av_packet_unref(pkt); return ret; } int ff_decode_get_packet(AVCodecContext *avctx, AVPacket *pkt) { AVCodecInternal *avci = avctx->internal; DecodeContext *dc = decode_ctx(avci); if (avci->draining) return AVERROR_EOF; while (1) { int ret = decode_get_packet(avctx, pkt); if (ret == AVERROR(EAGAIN) && (!AVPACKET_IS_EMPTY(avci->buffer_pkt) || dc->draining_started)) { ret = av_bsf_send_packet(avci->bsf, avci->buffer_pkt); if (ret < 0) { av_packet_unref(avci->buffer_pkt); return ret; } continue; } return ret; } } /** * Attempt to guess proper monotonic timestamps for decoded video frames * which might have incorrect times. Input timestamps may wrap around, in * which case the output will as well. * * @param pts the pts field of the decoded AVPacket, as passed through * AVFrame.pts * @param dts the dts field of the decoded AVPacket * @return one of the input values, may be AV_NOPTS_VALUE */ static int64_t guess_correct_pts(AVCodecContext *ctx, int64_t reordered_pts, int64_t dts) { int64_t pts = AV_NOPTS_VALUE; if (dts != AV_NOPTS_VALUE) { ctx->pts_correction_num_faulty_dts += dts <= ctx->pts_correction_last_dts; ctx->pts_correction_last_dts = dts; } else if (reordered_pts != AV_NOPTS_VALUE) ctx->pts_correction_last_dts = reordered_pts; if (reordered_pts != AV_NOPTS_VALUE) { ctx->pts_correction_num_faulty_pts += reordered_pts <= ctx->pts_correction_last_pts; ctx->pts_correction_last_pts = reordered_pts; } else if(dts != AV_NOPTS_VALUE) ctx->pts_correction_last_pts = dts; if ((ctx->pts_correction_num_faulty_pts<=ctx->pts_correction_num_faulty_dts || dts == AV_NOPTS_VALUE) && reordered_pts != AV_NOPTS_VALUE) pts = reordered_pts; else pts = dts; return pts; } static int discard_samples(AVCodecContext *avctx, AVFrame *frame, int64_t *discarded_samples) { AVCodecInternal *avci = avctx->internal; AVFrameSideData *side; uint32_t discard_padding = 0; uint8_t skip_reason = 0; uint8_t discard_reason = 0; side = av_frame_get_side_data(frame, AV_FRAME_DATA_SKIP_SAMPLES); if (side && side->size >= 10) { avci->skip_samples = AV_RL32(side->data); avci->skip_samples = FFMAX(0, avci->skip_samples); discard_padding = AV_RL32(side->data + 4); av_log(avctx, AV_LOG_DEBUG, "skip %d / discard %d samples due to side data\n", avci->skip_samples, (int)discard_padding); skip_reason = AV_RL8(side->data + 8); discard_reason = AV_RL8(side->data + 9); } if ((avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) { if (!side && (avci->skip_samples || discard_padding)) side = av_frame_new_side_data(frame, AV_FRAME_DATA_SKIP_SAMPLES, 10); if (side && (avci->skip_samples || discard_padding)) { AV_WL32(side->data, avci->skip_samples); AV_WL32(side->data + 4, discard_padding); AV_WL8(side->data + 8, skip_reason); AV_WL8(side->data + 9, discard_reason); avci->skip_samples = 0; } return 0; } av_frame_remove_side_data(frame, AV_FRAME_DATA_SKIP_SAMPLES); if ((frame->flags & AV_FRAME_FLAG_DISCARD)) { avci->skip_samples = FFMAX(0, avci->skip_samples - frame->nb_samples); *discarded_samples += frame->nb_samples; return AVERROR(EAGAIN); } if (avci->skip_samples > 0) { if (frame->nb_samples <= avci->skip_samples){ *discarded_samples += frame->nb_samples; avci->skip_samples -= frame->nb_samples; av_log(avctx, AV_LOG_DEBUG, "skip whole frame, skip left: %d\n", avci->skip_samples); return AVERROR(EAGAIN); } else { av_samples_copy(frame->extended_data, frame->extended_data, 0, avci->skip_samples, frame->nb_samples - avci->skip_samples, avctx->ch_layout.nb_channels, frame->format); if (avctx->pkt_timebase.num && avctx->sample_rate) { int64_t diff_ts = av_rescale_q(avci->skip_samples, (AVRational){1, avctx->sample_rate}, avctx->pkt_timebase); if (frame->pts != AV_NOPTS_VALUE) frame->pts += diff_ts; if (frame->pkt_dts != AV_NOPTS_VALUE) frame->pkt_dts += diff_ts; if (frame->duration >= diff_ts) frame->duration -= diff_ts; } else av_log(avctx, AV_LOG_WARNING, "Could not update timestamps for skipped samples.\n"); av_log(avctx, AV_LOG_DEBUG, "skip %d/%d samples\n", avci->skip_samples, frame->nb_samples); *discarded_samples += avci->skip_samples; frame->nb_samples -= avci->skip_samples; avci->skip_samples = 0; } } if (discard_padding > 0 && discard_padding <= frame->nb_samples) { if (discard_padding == frame->nb_samples) { *discarded_samples += frame->nb_samples; return AVERROR(EAGAIN); } else { if (avctx->pkt_timebase.num && avctx->sample_rate) { int64_t diff_ts = av_rescale_q(frame->nb_samples - discard_padding, (AVRational){1, avctx->sample_rate}, avctx->pkt_timebase); frame->duration = diff_ts; } else av_log(avctx, AV_LOG_WARNING, "Could not update timestamps for discarded samples.\n"); av_log(avctx, AV_LOG_DEBUG, "discard %d/%d samples\n", (int)discard_padding, frame->nb_samples); frame->nb_samples -= discard_padding; } } return 0; } /* * The core of the receive_frame_wrapper for the decoders implementing * the simple API. Certain decoders might consume partial packets without * returning any output, so this function needs to be called in a loop until it * returns EAGAIN. **/ static inline int decode_simple_internal(AVCodecContext *avctx, AVFrame *frame, int64_t *discarded_samples) { AVCodecInternal *avci = avctx->internal; AVPacket *const pkt = avci->in_pkt; const FFCodec *const codec = ffcodec(avctx->codec); int got_frame, consumed; int ret; if (!pkt->data && !avci->draining) { av_packet_unref(pkt); ret = ff_decode_get_packet(avctx, pkt); if (ret < 0 && ret != AVERROR_EOF) return ret; } // Some codecs (at least wma lossless) will crash when feeding drain packets // after EOF was signaled. if (avci->draining_done) return AVERROR_EOF; if (!pkt->data && !(avctx->codec->capabilities & AV_CODEC_CAP_DELAY || avctx->active_thread_type & FF_THREAD_FRAME)) return AVERROR_EOF; got_frame = 0; if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME) { consumed = ff_thread_decode_frame(avctx, frame, &got_frame, pkt); } else { consumed = codec->cb.decode(avctx, frame, &got_frame, pkt); if (!(codec->caps_internal & FF_CODEC_CAP_SETS_PKT_DTS)) frame->pkt_dts = pkt->dts; if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) { #if FF_API_FRAME_PKT FF_DISABLE_DEPRECATION_WARNINGS if(!avctx->has_b_frames) frame->pkt_pos = pkt->pos; FF_ENABLE_DEPRECATION_WARNINGS #endif } } emms_c(); if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) { ret = (!got_frame || frame->flags & AV_FRAME_FLAG_DISCARD) ? AVERROR(EAGAIN) : 0; } else if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) { ret = !got_frame ? AVERROR(EAGAIN) : discard_samples(avctx, frame, discarded_samples); } if (ret == AVERROR(EAGAIN)) av_frame_unref(frame); if (consumed < 0) ret = consumed; if (consumed >= 0 && avctx->codec->type == AVMEDIA_TYPE_VIDEO) consumed = pkt->size; if (!ret) av_assert0(frame->buf[0]); if (ret == AVERROR(EAGAIN)) ret = 0; /* do not stop draining when got_frame != 0 or ret < 0 */ if (avci->draining && !got_frame) { if (ret < 0) { /* prevent infinite loop if a decoder wrongly always return error on draining */ /* reasonable nb_errors_max = maximum b frames + thread count */ int nb_errors_max = 20 + (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME ? avctx->thread_count : 1); if (decode_ctx(avci)->nb_draining_errors++ >= nb_errors_max) { av_log(avctx, AV_LOG_ERROR, "Too many errors when draining, this is a bug. " "Stop draining and force EOF.\n"); avci->draining_done = 1; ret = AVERROR_BUG; } } else { avci->draining_done = 1; } } if (consumed >= pkt->size || ret < 0) { av_packet_unref(pkt); } else { pkt->data += consumed; pkt->size -= consumed; pkt->pts = AV_NOPTS_VALUE; pkt->dts = AV_NOPTS_VALUE; if (!(codec->caps_internal & FF_CODEC_CAP_SETS_FRAME_PROPS)) { #if FF_API_FRAME_PKT // See extract_packet_props() comment. avci->last_pkt_props->stream_index = avci->last_pkt_props->stream_index - consumed; #endif avci->last_pkt_props->pts = AV_NOPTS_VALUE; avci->last_pkt_props->dts = AV_NOPTS_VALUE; } } return ret; } #if CONFIG_LCMS2 static int detect_colorspace(AVCodecContext *avctx, AVFrame *frame) { AVCodecInternal *avci = avctx->internal; enum AVColorTransferCharacteristic trc; AVColorPrimariesDesc coeffs; enum AVColorPrimaries prim; cmsHPROFILE profile; AVFrameSideData *sd; int ret; if (!(avctx->flags2 & AV_CODEC_FLAG2_ICC_PROFILES)) return 0; sd = av_frame_get_side_data(frame, AV_FRAME_DATA_ICC_PROFILE); if (!sd || !sd->size) return 0; if (!avci->icc.avctx) { ret = ff_icc_context_init(&avci->icc, avctx); if (ret < 0) return ret; } profile = cmsOpenProfileFromMemTHR(avci->icc.ctx, sd->data, sd->size); if (!profile) return AVERROR_INVALIDDATA; ret = ff_icc_profile_read_primaries(&avci->icc, profile, &coeffs); if (!ret) ret = ff_icc_profile_detect_transfer(&avci->icc, profile, &trc); cmsCloseProfile(profile); if (ret < 0) return ret; prim = av_csp_primaries_id_from_desc(&coeffs); if (prim != AVCOL_PRI_UNSPECIFIED) frame->color_primaries = prim; if (trc != AVCOL_TRC_UNSPECIFIED) frame->color_trc = trc; return 0; } #else /* !CONFIG_LCMS2 */ static int detect_colorspace(av_unused AVCodecContext *c, av_unused AVFrame *f) { return 0; } #endif static int fill_frame_props(const AVCodecContext *avctx, AVFrame *frame) { int ret; if (frame->color_primaries == AVCOL_PRI_UNSPECIFIED) frame->color_primaries = avctx->color_primaries; if (frame->color_trc == AVCOL_TRC_UNSPECIFIED) frame->color_trc = avctx->color_trc; if (frame->colorspace == AVCOL_SPC_UNSPECIFIED) frame->colorspace = avctx->colorspace; if (frame->color_range == AVCOL_RANGE_UNSPECIFIED) frame->color_range = avctx->color_range; if (frame->chroma_location == AVCHROMA_LOC_UNSPECIFIED) frame->chroma_location = avctx->chroma_sample_location; if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) { if (!frame->sample_aspect_ratio.num) frame->sample_aspect_ratio = avctx->sample_aspect_ratio; if (frame->format == AV_PIX_FMT_NONE) frame->format = avctx->pix_fmt; } else if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) { if (frame->format == AV_SAMPLE_FMT_NONE) frame->format = avctx->sample_fmt; if (!frame->ch_layout.nb_channels) { ret = av_channel_layout_copy(&frame->ch_layout, &avctx->ch_layout); if (ret < 0) return ret; } #if FF_API_OLD_CHANNEL_LAYOUT FF_DISABLE_DEPRECATION_WARNINGS if (!frame->channel_layout) frame->channel_layout = avctx->ch_layout.order == AV_CHANNEL_ORDER_NATIVE ? avctx->ch_layout.u.mask : 0; if (!frame->channels) frame->channels = avctx->ch_layout.nb_channels; FF_ENABLE_DEPRECATION_WARNINGS #endif if (!frame->sample_rate) frame->sample_rate = avctx->sample_rate; } return 0; } static int decode_simple_receive_frame(AVCodecContext *avctx, AVFrame *frame) { int ret; int64_t discarded_samples = 0; while (!frame->buf[0]) { if (discarded_samples > avctx->max_samples) return AVERROR(EAGAIN); ret = decode_simple_internal(avctx, frame, &discarded_samples); if (ret < 0) return ret; } return 0; } static int decode_receive_frame_internal(AVCodecContext *avctx, AVFrame *frame) { AVCodecInternal *avci = avctx->internal; const FFCodec *const codec = ffcodec(avctx->codec); int ret, ok; av_assert0(!frame->buf[0]); if (codec->cb_type == FF_CODEC_CB_TYPE_RECEIVE_FRAME) { ret = codec->cb.receive_frame(avctx, frame); emms_c(); if (!ret) { if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) ret = (frame->flags & AV_FRAME_FLAG_DISCARD) ? AVERROR(EAGAIN) : 0; else if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) { int64_t discarded_samples = 0; ret = discard_samples(avctx, frame, &discarded_samples); } } } else ret = decode_simple_receive_frame(avctx, frame); if (ret == AVERROR_EOF) avci->draining_done = 1; /* preserve ret */ ok = detect_colorspace(avctx, frame); if (ok < 0) { av_frame_unref(frame); return ok; } if (!ret) { if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) { if (!frame->width) frame->width = avctx->width; if (!frame->height) frame->height = avctx->height; } else frame->flags |= AV_FRAME_FLAG_KEY; ret = fill_frame_props(avctx, frame); if (ret < 0) { av_frame_unref(frame); return ret; } #if FF_API_FRAME_KEY FF_DISABLE_DEPRECATION_WARNINGS frame->key_frame = !!(frame->flags & AV_FRAME_FLAG_KEY); FF_ENABLE_DEPRECATION_WARNINGS #endif #if FF_API_INTERLACED_FRAME FF_DISABLE_DEPRECATION_WARNINGS frame->interlaced_frame = !!(frame->flags & AV_FRAME_FLAG_INTERLACED); frame->top_field_first = !!(frame->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST); FF_ENABLE_DEPRECATION_WARNINGS #endif frame->best_effort_timestamp = guess_correct_pts(avctx, frame->pts, frame->pkt_dts); #if FF_API_PKT_DURATION FF_DISABLE_DEPRECATION_WARNINGS frame->pkt_duration = frame->duration; FF_ENABLE_DEPRECATION_WARNINGS #endif /* the only case where decode data is not set should be decoders * that do not call ff_get_buffer() */ av_assert0((frame->private_ref && frame->private_ref->size == sizeof(FrameDecodeData)) || !(avctx->codec->capabilities & AV_CODEC_CAP_DR1)); if (frame->private_ref) { FrameDecodeData *fdd = (FrameDecodeData*)frame->private_ref->data; if (fdd->post_process) { ret = fdd->post_process(avctx, frame); if (ret < 0) { av_frame_unref(frame); return ret; } } } } /* free the per-frame decode data */ av_buffer_unref(&frame->private_ref); return ret; } int attribute_align_arg avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt) { AVCodecInternal *avci = avctx->internal; DecodeContext *dc = decode_ctx(avci); int ret; if (!avcodec_is_open(avctx) || !av_codec_is_decoder(avctx->codec)) return AVERROR(EINVAL); if (dc->draining_started) return AVERROR_EOF; if (avpkt && !avpkt->size && avpkt->data) return AVERROR(EINVAL); if (avpkt && (avpkt->data || avpkt->side_data_elems)) { if (!AVPACKET_IS_EMPTY(avci->buffer_pkt)) return AVERROR(EAGAIN); ret = av_packet_ref(avci->buffer_pkt, avpkt); if (ret < 0) return ret; } else dc->draining_started = 1; if (!avci->buffer_frame->buf[0] && !dc->draining_started) { ret = decode_receive_frame_internal(avctx, avci->buffer_frame); if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) return ret; } return 0; } static int apply_cropping(AVCodecContext *avctx, AVFrame *frame) { /* make sure we are noisy about decoders returning invalid cropping data */ if (frame->crop_left >= INT_MAX - frame->crop_right || frame->crop_top >= INT_MAX - frame->crop_bottom || (frame->crop_left + frame->crop_right) >= frame->width || (frame->crop_top + frame->crop_bottom) >= frame->height) { av_log(avctx, AV_LOG_WARNING, "Invalid cropping information set by a decoder: " "%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER" " "(frame size %dx%d). This is a bug, please report it\n", frame->crop_left, frame->crop_right, frame->crop_top, frame->crop_bottom, frame->width, frame->height); frame->crop_left = 0; frame->crop_right = 0; frame->crop_top = 0; frame->crop_bottom = 0; return 0; } if (!avctx->apply_cropping) return 0; return av_frame_apply_cropping(frame, avctx->flags & AV_CODEC_FLAG_UNALIGNED ? AV_FRAME_CROP_UNALIGNED : 0); } // make sure frames returned to the caller are valid static int frame_validate(AVCodecContext *avctx, AVFrame *frame) { if (!frame->buf[0] || frame->format < 0) goto fail; switch (avctx->codec_type) { case AVMEDIA_TYPE_VIDEO: if (frame->width <= 0 || frame->height <= 0) goto fail; break; case AVMEDIA_TYPE_AUDIO: if (!av_channel_layout_check(&frame->ch_layout) || frame->sample_rate <= 0) goto fail; break; default: av_assert0(0); } return 0; fail: av_log(avctx, AV_LOG_ERROR, "An invalid frame was output by a decoder. " "This is a bug, please report it.\n"); return AVERROR_BUG; } int ff_decode_receive_frame(AVCodecContext *avctx, AVFrame *frame) { AVCodecInternal *avci = avctx->internal; int ret; if (!avcodec_is_open(avctx) || !av_codec_is_decoder(avctx->codec)) return AVERROR(EINVAL); if (avci->buffer_frame->buf[0]) { av_frame_move_ref(frame, avci->buffer_frame); } else { ret = decode_receive_frame_internal(avctx, frame); if (ret < 0) return ret; } ret = frame_validate(avctx, frame); if (ret < 0) goto fail; if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) { ret = apply_cropping(avctx, frame); if (ret < 0) goto fail; } avctx->frame_num++; #if FF_API_AVCTX_FRAME_NUMBER FF_DISABLE_DEPRECATION_WARNINGS avctx->frame_number = avctx->frame_num; FF_ENABLE_DEPRECATION_WARNINGS #endif #if FF_API_DROPCHANGED if (avctx->flags & AV_CODEC_FLAG_DROPCHANGED) { if (avctx->frame_num == 1) { avci->initial_format = frame->format; switch(avctx->codec_type) { case AVMEDIA_TYPE_VIDEO: avci->initial_width = frame->width; avci->initial_height = frame->height; break; case AVMEDIA_TYPE_AUDIO: avci->initial_sample_rate = frame->sample_rate ? frame->sample_rate : avctx->sample_rate; ret = av_channel_layout_copy(&avci->initial_ch_layout, &frame->ch_layout); if (ret < 0) goto fail; break; } } if (avctx->frame_num > 1) { int changed = avci->initial_format != frame->format; switch(avctx->codec_type) { case AVMEDIA_TYPE_VIDEO: changed |= avci->initial_width != frame->width || avci->initial_height != frame->height; break; case AVMEDIA_TYPE_AUDIO: changed |= avci->initial_sample_rate != frame->sample_rate || avci->initial_sample_rate != avctx->sample_rate || av_channel_layout_compare(&avci->initial_ch_layout, &frame->ch_layout); break; } if (changed) { avci->changed_frames_dropped++; av_log(avctx, AV_LOG_INFO, "dropped changed frame #%"PRId64" pts %"PRId64 " drop count: %d \n", avctx->frame_num, frame->pts, avci->changed_frames_dropped); ret = AVERROR_INPUT_CHANGED; goto fail; } } } #endif return 0; fail: av_frame_unref(frame); return ret; } static void get_subtitle_defaults(AVSubtitle *sub) { memset(sub, 0, sizeof(*sub)); sub->pts = AV_NOPTS_VALUE; } #define UTF8_MAX_BYTES 4 /* 5 and 6 bytes sequences should not be used */ static int recode_subtitle(AVCodecContext *avctx, const AVPacket **outpkt, const AVPacket *inpkt, AVPacket *buf_pkt) { #if CONFIG_ICONV iconv_t cd = (iconv_t)-1; int ret = 0; char *inb, *outb; size_t inl, outl; #endif if (avctx->sub_charenc_mode != FF_SUB_CHARENC_MODE_PRE_DECODER || inpkt->size == 0) { *outpkt = inpkt; return 0; } #if CONFIG_ICONV inb = inpkt->data; inl = inpkt->size; if (inl >= INT_MAX / UTF8_MAX_BYTES - AV_INPUT_BUFFER_PADDING_SIZE) { av_log(avctx, AV_LOG_ERROR, "Subtitles packet is too big for recoding\n"); return AVERROR(ERANGE); } cd = iconv_open("UTF-8", avctx->sub_charenc); av_assert0(cd != (iconv_t)-1); ret = av_new_packet(buf_pkt, inl * UTF8_MAX_BYTES); if (ret < 0) goto end; ret = av_packet_copy_props(buf_pkt, inpkt); if (ret < 0) goto end; outb = buf_pkt->data; outl = buf_pkt->size; if (iconv(cd, &inb, &inl, &outb, &outl) == (size_t)-1 || iconv(cd, NULL, NULL, &outb, &outl) == (size_t)-1 || outl >= buf_pkt->size || inl != 0) { ret = FFMIN(AVERROR(errno), -1); av_log(avctx, AV_LOG_ERROR, "Unable to recode subtitle event \"%s\" " "from %s to UTF-8\n", inpkt->data, avctx->sub_charenc); goto end; } buf_pkt->size -= outl; memset(buf_pkt->data + buf_pkt->size, 0, outl); *outpkt = buf_pkt; ret = 0; end: if (ret < 0) av_packet_unref(buf_pkt); if (cd != (iconv_t)-1) iconv_close(cd); return ret; #else av_log(avctx, AV_LOG_ERROR, "requesting subtitles recoding without iconv"); return AVERROR(EINVAL); #endif } static int utf8_check(const uint8_t *str) { const uint8_t *byte; uint32_t codepoint, min; while (*str) { byte = str; GET_UTF8(codepoint, *(byte++), return 0;); min = byte - str == 1 ? 0 : byte - str == 2 ? 0x80 : 1 << (5 * (byte - str) - 4); if (codepoint < min || codepoint >= 0x110000 || codepoint == 0xFFFE /* BOM */ || codepoint >= 0xD800 && codepoint <= 0xDFFF /* surrogates */) return 0; str = byte; } return 1; } int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub, int *got_sub_ptr, const AVPacket *avpkt) { int ret = 0; if (!avpkt->data && avpkt->size) { av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n"); return AVERROR(EINVAL); } if (!avctx->codec) return AVERROR(EINVAL); if (avctx->codec->type != AVMEDIA_TYPE_SUBTITLE) { av_log(avctx, AV_LOG_ERROR, "Invalid media type for subtitles\n"); return AVERROR(EINVAL); } *got_sub_ptr = 0; get_subtitle_defaults(sub); if ((avctx->codec->capabilities & AV_CODEC_CAP_DELAY) || avpkt->size) { AVCodecInternal *avci = avctx->internal; const AVPacket *pkt; ret = recode_subtitle(avctx, &pkt, avpkt, avci->buffer_pkt); if (ret < 0) return ret; if (avctx->pkt_timebase.num && avpkt->pts != AV_NOPTS_VALUE) sub->pts = av_rescale_q(avpkt->pts, avctx->pkt_timebase, AV_TIME_BASE_Q); ret = ffcodec(avctx->codec)->cb.decode_sub(avctx, sub, got_sub_ptr, pkt); if (pkt == avci->buffer_pkt) // did we recode? av_packet_unref(avci->buffer_pkt); if (ret < 0) { *got_sub_ptr = 0; avsubtitle_free(sub); return ret; } av_assert1(!sub->num_rects || *got_sub_ptr); if (sub->num_rects && !sub->end_display_time && avpkt->duration && avctx->pkt_timebase.num) { AVRational ms = { 1, 1000 }; sub->end_display_time = av_rescale_q(avpkt->duration, avctx->pkt_timebase, ms); } if (avctx->codec_descriptor->props & AV_CODEC_PROP_BITMAP_SUB) sub->format = 0; else if (avctx->codec_descriptor->props & AV_CODEC_PROP_TEXT_SUB) sub->format = 1; for (unsigned i = 0; i < sub->num_rects; i++) { if (avctx->sub_charenc_mode != FF_SUB_CHARENC_MODE_IGNORE && sub->rects[i]->ass && !utf8_check(sub->rects[i]->ass)) { av_log(avctx, AV_LOG_ERROR, "Invalid UTF-8 in decoded subtitles text; " "maybe missing -sub_charenc option\n"); avsubtitle_free(sub); *got_sub_ptr = 0; return AVERROR_INVALIDDATA; } } if (*got_sub_ptr) avctx->frame_num++; #if FF_API_AVCTX_FRAME_NUMBER FF_DISABLE_DEPRECATION_WARNINGS avctx->frame_number = avctx->frame_num; FF_ENABLE_DEPRECATION_WARNINGS #endif } return ret; } enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *avctx, const enum AVPixelFormat *fmt) { const AVPixFmtDescriptor *desc; const AVCodecHWConfig *config; int i, n; // If a device was supplied when the codec was opened, assume that the // user wants to use it. if (avctx->hw_device_ctx && ffcodec(avctx->codec)->hw_configs) { AVHWDeviceContext *device_ctx = (AVHWDeviceContext*)avctx->hw_device_ctx->data; for (i = 0;; i++) { config = &ffcodec(avctx->codec)->hw_configs[i]->public; if (!config) break; if (!(config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX)) continue; if (device_ctx->type != config->device_type) continue; for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++) { if (config->pix_fmt == fmt[n]) return fmt[n]; } } } // No device or other setup, so we have to choose from things which // don't any other external information. // If the last element of the list is a software format, choose it // (this should be best software format if any exist). for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++); desc = av_pix_fmt_desc_get(fmt[n - 1]); if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL)) return fmt[n - 1]; // Finally, traverse the list in order and choose the first entry // with no external dependencies (if there is no hardware configuration // information available then this just picks the first entry). for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++) { for (i = 0;; i++) { config = avcodec_get_hw_config(avctx->codec, i); if (!config) break; if (config->pix_fmt == fmt[n]) break; } if (!config) { // No specific config available, so the decoder must be able // to handle this format without any additional setup. return fmt[n]; } if (config->methods & AV_CODEC_HW_CONFIG_METHOD_INTERNAL) { // Usable with only internal setup. return fmt[n]; } } // Nothing is usable, give up. return AV_PIX_FMT_NONE; } int ff_decode_get_hw_frames_ctx(AVCodecContext *avctx, enum AVHWDeviceType dev_type) { AVHWDeviceContext *device_ctx; AVHWFramesContext *frames_ctx; int ret; if (!avctx->hwaccel) return AVERROR(ENOSYS); if (avctx->hw_frames_ctx) return 0; if (!avctx->hw_device_ctx) { av_log(avctx, AV_LOG_ERROR, "A hardware frames or device context is " "required for hardware accelerated decoding.\n"); return AVERROR(EINVAL); } device_ctx = (AVHWDeviceContext *)avctx->hw_device_ctx->data; if (device_ctx->type != dev_type) { av_log(avctx, AV_LOG_ERROR, "Device type %s expected for hardware " "decoding, but got %s.\n", av_hwdevice_get_type_name(dev_type), av_hwdevice_get_type_name(device_ctx->type)); return AVERROR(EINVAL); } ret = avcodec_get_hw_frames_parameters(avctx, avctx->hw_device_ctx, avctx->hwaccel->pix_fmt, &avctx->hw_frames_ctx); if (ret < 0) return ret; frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data; if (frames_ctx->initial_pool_size) { // We guarantee 4 base work surfaces. The function above guarantees 1 // (the absolute minimum), so add the missing count. frames_ctx->initial_pool_size += 3; } ret = av_hwframe_ctx_init(avctx->hw_frames_ctx); if (ret < 0) { av_buffer_unref(&avctx->hw_frames_ctx); return ret; } return 0; } int avcodec_get_hw_frames_parameters(AVCodecContext *avctx, AVBufferRef *device_ref, enum AVPixelFormat hw_pix_fmt, AVBufferRef **out_frames_ref) { AVBufferRef *frames_ref = NULL; const AVCodecHWConfigInternal *hw_config; const AVHWAccel *hwa; int i, ret; for (i = 0;; i++) { hw_config = ffcodec(avctx->codec)->hw_configs[i]; if (!hw_config) return AVERROR(ENOENT); if (hw_config->public.pix_fmt == hw_pix_fmt) break; } hwa = hw_config->hwaccel; if (!hwa || !hwa->frame_params) return AVERROR(ENOENT); frames_ref = av_hwframe_ctx_alloc(device_ref); if (!frames_ref) return AVERROR(ENOMEM); if (!avctx->internal->hwaccel_priv_data) { avctx->internal->hwaccel_priv_data = av_mallocz(hwa->priv_data_size); if (!avctx->internal->hwaccel_priv_data) { av_buffer_unref(&frames_ref); return AVERROR(ENOMEM); } } ret = hwa->frame_params(avctx, frames_ref); if (ret >= 0) { AVHWFramesContext *frames_ctx = (AVHWFramesContext*)frames_ref->data; if (frames_ctx->initial_pool_size) { // If the user has requested that extra output surfaces be // available then add them here. if (avctx->extra_hw_frames > 0) frames_ctx->initial_pool_size += avctx->extra_hw_frames; // If frame threading is enabled then an extra surface per thread // is also required. if (avctx->active_thread_type & FF_THREAD_FRAME) frames_ctx->initial_pool_size += avctx->thread_count; } *out_frames_ref = frames_ref; } else { av_buffer_unref(&frames_ref); } return ret; } static int hwaccel_init(AVCodecContext *avctx, const AVHWAccel *hwaccel) { int err; if (hwaccel->capabilities & AV_HWACCEL_CODEC_CAP_EXPERIMENTAL && avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) { av_log(avctx, AV_LOG_WARNING, "Ignoring experimental hwaccel: %s\n", hwaccel->name); return AVERROR_PATCHWELCOME; } if (!avctx->internal->hwaccel_priv_data && hwaccel->priv_data_size) { avctx->internal->hwaccel_priv_data = av_mallocz(hwaccel->priv_data_size); if (!avctx->internal->hwaccel_priv_data) return AVERROR(ENOMEM); } avctx->hwaccel = hwaccel; if (hwaccel->init) { err = hwaccel->init(avctx); if (err < 0) { av_log(avctx, AV_LOG_ERROR, "Failed setup for format %s: " "hwaccel initialisation returned error.\n", av_get_pix_fmt_name(hwaccel->pix_fmt)); av_freep(&avctx->internal->hwaccel_priv_data); avctx->hwaccel = NULL; return err; } } return 0; } void ff_hwaccel_uninit(AVCodecContext *avctx) { if (avctx->hwaccel && avctx->hwaccel->uninit) avctx->hwaccel->uninit(avctx); av_freep(&avctx->internal->hwaccel_priv_data); avctx->hwaccel = NULL; av_buffer_unref(&avctx->hw_frames_ctx); } int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt) { const AVPixFmtDescriptor *desc; enum AVPixelFormat *choices; enum AVPixelFormat ret, user_choice; const AVCodecHWConfigInternal *hw_config; const AVCodecHWConfig *config; int i, n, err; // Find end of list. for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++); // Must contain at least one entry. av_assert0(n >= 1); // If a software format is available, it must be the last entry. desc = av_pix_fmt_desc_get(fmt[n - 1]); if (desc->flags & AV_PIX_FMT_FLAG_HWACCEL) { // No software format is available. } else { avctx->sw_pix_fmt = fmt[n - 1]; } choices = av_memdup(fmt, (n + 1) * sizeof(*choices)); if (!choices) return AV_PIX_FMT_NONE; for (;;) { // Remove the previous hwaccel, if there was one. ff_hwaccel_uninit(avctx); user_choice = avctx->get_format(avctx, choices); if (user_choice == AV_PIX_FMT_NONE) { // Explicitly chose nothing, give up. ret = AV_PIX_FMT_NONE; break; } desc = av_pix_fmt_desc_get(user_choice); if (!desc) { av_log(avctx, AV_LOG_ERROR, "Invalid format returned by " "get_format() callback.\n"); ret = AV_PIX_FMT_NONE; break; } av_log(avctx, AV_LOG_DEBUG, "Format %s chosen by get_format().\n", desc->name); for (i = 0; i < n; i++) { if (choices[i] == user_choice) break; } if (i == n) { av_log(avctx, AV_LOG_ERROR, "Invalid return from get_format(): " "%s not in possible list.\n", desc->name); ret = AV_PIX_FMT_NONE; break; } if (ffcodec(avctx->codec)->hw_configs) { for (i = 0;; i++) { hw_config = ffcodec(avctx->codec)->hw_configs[i]; if (!hw_config) break; if (hw_config->public.pix_fmt == user_choice) break; } } else { hw_config = NULL; } if (!hw_config) { // No config available, so no extra setup required. ret = user_choice; break; } config = &hw_config->public; if (config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX && avctx->hw_frames_ctx) { const AVHWFramesContext *frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data; if (frames_ctx->format != user_choice) { av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: " "does not match the format of the provided frames " "context.\n", desc->name); goto try_again; } } else if (config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX && avctx->hw_device_ctx) { const AVHWDeviceContext *device_ctx = (AVHWDeviceContext*)avctx->hw_device_ctx->data; if (device_ctx->type != config->device_type) { av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: " "does not match the type of the provided device " "context.\n", desc->name); goto try_again; } } else if (config->methods & AV_CODEC_HW_CONFIG_METHOD_INTERNAL) { // Internal-only setup, no additional configuration. } else if (config->methods & AV_CODEC_HW_CONFIG_METHOD_AD_HOC) { // Some ad-hoc configuration we can't see and can't check. } else { av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: " "missing configuration.\n", desc->name); goto try_again; } if (hw_config->hwaccel) { av_log(avctx, AV_LOG_DEBUG, "Format %s requires hwaccel " "initialisation.\n", desc->name); err = hwaccel_init(avctx, hw_config->hwaccel); if (err < 0) goto try_again; } ret = user_choice; break; try_again: av_log(avctx, AV_LOG_DEBUG, "Format %s not usable, retrying " "get_format() without it.\n", desc->name); for (i = 0; i < n; i++) { if (choices[i] == user_choice) break; } for (; i + 1 < n; i++) choices[i] = choices[i + 1]; --n; } if (ret < 0) ff_hwaccel_uninit(avctx); av_freep(&choices); return ret; } static int add_metadata_from_side_data(const AVPacket *avpkt, AVFrame *frame) { size_t size; const uint8_t *side_metadata; AVDictionary **frame_md = &frame->metadata; side_metadata = av_packet_get_side_data(avpkt, AV_PKT_DATA_STRINGS_METADATA, &size); return av_packet_unpack_dictionary(side_metadata, size, frame_md); } int ff_decode_frame_props_from_pkt(const AVCodecContext *avctx, AVFrame *frame, const AVPacket *pkt) { static const struct { enum AVPacketSideDataType packet; enum AVFrameSideDataType frame; } sd[] = { { AV_PKT_DATA_REPLAYGAIN , AV_FRAME_DATA_REPLAYGAIN }, { AV_PKT_DATA_DISPLAYMATRIX, AV_FRAME_DATA_DISPLAYMATRIX }, { AV_PKT_DATA_SPHERICAL, AV_FRAME_DATA_SPHERICAL }, { AV_PKT_DATA_STEREO3D, AV_FRAME_DATA_STEREO3D }, { AV_PKT_DATA_AUDIO_SERVICE_TYPE, AV_FRAME_DATA_AUDIO_SERVICE_TYPE }, { AV_PKT_DATA_MASTERING_DISPLAY_METADATA, AV_FRAME_DATA_MASTERING_DISPLAY_METADATA }, { AV_PKT_DATA_CONTENT_LIGHT_LEVEL, AV_FRAME_DATA_CONTENT_LIGHT_LEVEL }, { AV_PKT_DATA_A53_CC, AV_FRAME_DATA_A53_CC }, { AV_PKT_DATA_AFD, AV_FRAME_DATA_AFD }, { AV_PKT_DATA_ICC_PROFILE, AV_FRAME_DATA_ICC_PROFILE }, { AV_PKT_DATA_S12M_TIMECODE, AV_FRAME_DATA_S12M_TIMECODE }, { AV_PKT_DATA_DYNAMIC_HDR10_PLUS, AV_FRAME_DATA_DYNAMIC_HDR_PLUS }, { AV_PKT_DATA_SKIP_SAMPLES, AV_FRAME_DATA_SKIP_SAMPLES }, }; frame->pts = pkt->pts; frame->duration = pkt->duration; #if FF_API_FRAME_PKT FF_DISABLE_DEPRECATION_WARNINGS frame->pkt_pos = pkt->pos; frame->pkt_size = pkt->size; FF_ENABLE_DEPRECATION_WARNINGS #endif for (int i = 0; i < FF_ARRAY_ELEMS(sd); i++) { size_t size; uint8_t *packet_sd = av_packet_get_side_data(pkt, sd[i].packet, &size); if (packet_sd) { AVFrameSideData *frame_sd = av_frame_new_side_data(frame, sd[i].frame, size); if (!frame_sd) return AVERROR(ENOMEM); memcpy(frame_sd->data, packet_sd, size); } } add_metadata_from_side_data(pkt, frame); if (pkt->flags & AV_PKT_FLAG_DISCARD) { frame->flags |= AV_FRAME_FLAG_DISCARD; } else { frame->flags = (frame->flags & ~AV_FRAME_FLAG_DISCARD); } if (avctx->flags & AV_CODEC_FLAG_COPY_OPAQUE) { int ret = av_buffer_replace(&frame->opaque_ref, pkt->opaque_ref); if (ret < 0) return ret; frame->opaque = pkt->opaque; } return 0; } int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame) { const AVPacket *pkt = avctx->internal->last_pkt_props; int ret; if (!(ffcodec(avctx->codec)->caps_internal & FF_CODEC_CAP_SETS_FRAME_PROPS)) { ret = ff_decode_frame_props_from_pkt(avctx, frame, pkt); if (ret < 0) return ret; #if FF_API_FRAME_PKT FF_DISABLE_DEPRECATION_WARNINGS frame->pkt_size = pkt->stream_index; FF_ENABLE_DEPRECATION_WARNINGS #endif } #if FF_API_REORDERED_OPAQUE FF_DISABLE_DEPRECATION_WARNINGS frame->reordered_opaque = avctx->reordered_opaque; FF_ENABLE_DEPRECATION_WARNINGS #endif ret = fill_frame_props(avctx, frame); if (ret < 0) return ret; switch (avctx->codec->type) { case AVMEDIA_TYPE_VIDEO: if (frame->width && frame->height && av_image_check_sar(frame->width, frame->height, frame->sample_aspect_ratio) < 0) { av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n", frame->sample_aspect_ratio.num, frame->sample_aspect_ratio.den); frame->sample_aspect_ratio = (AVRational){ 0, 1 }; } break; } return 0; } static void validate_avframe_allocation(AVCodecContext *avctx, AVFrame *frame) { if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) { int i; int num_planes = av_pix_fmt_count_planes(frame->format); const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format); int flags = desc ? desc->flags : 0; if (num_planes == 1 && (flags & AV_PIX_FMT_FLAG_PAL)) num_planes = 2; for (i = 0; i < num_planes; i++) { av_assert0(frame->data[i]); } // For formats without data like hwaccel allow unused pointers to be non-NULL. for (i = num_planes; num_planes > 0 && i < FF_ARRAY_ELEMS(frame->data); i++) { if (frame->data[i]) av_log(avctx, AV_LOG_ERROR, "Buffer returned by get_buffer2() did not zero unused plane pointers\n"); frame->data[i] = NULL; } } } static void decode_data_free(void *opaque, uint8_t *data) { FrameDecodeData *fdd = (FrameDecodeData*)data; if (fdd->post_process_opaque_free) fdd->post_process_opaque_free(fdd->post_process_opaque); if (fdd->hwaccel_priv_free) fdd->hwaccel_priv_free(fdd->hwaccel_priv); av_freep(&fdd); } int ff_attach_decode_data(AVFrame *frame) { AVBufferRef *fdd_buf; FrameDecodeData *fdd; av_assert1(!frame->private_ref); av_buffer_unref(&frame->private_ref); fdd = av_mallocz(sizeof(*fdd)); if (!fdd) return AVERROR(ENOMEM); fdd_buf = av_buffer_create((uint8_t*)fdd, sizeof(*fdd), decode_data_free, NULL, AV_BUFFER_FLAG_READONLY); if (!fdd_buf) { av_freep(&fdd); return AVERROR(ENOMEM); } frame->private_ref = fdd_buf; return 0; } int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags) { const AVHWAccel *hwaccel = avctx->hwaccel; int override_dimensions = 1; int ret; av_assert0(av_codec_is_decoder(avctx->codec)); if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) { if ((unsigned)avctx->width > INT_MAX - STRIDE_ALIGN || (ret = av_image_check_size2(FFALIGN(avctx->width, STRIDE_ALIGN), avctx->height, avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx)) < 0 || avctx->pix_fmt<0) { av_log(avctx, AV_LOG_ERROR, "video_get_buffer: image parameters invalid\n"); ret = AVERROR(EINVAL); goto fail; } if (frame->width <= 0 || frame->height <= 0) { frame->width = FFMAX(avctx->width, AV_CEIL_RSHIFT(avctx->coded_width, avctx->lowres)); frame->height = FFMAX(avctx->height, AV_CEIL_RSHIFT(avctx->coded_height, avctx->lowres)); override_dimensions = 0; } if (frame->data[0] || frame->data[1] || frame->data[2] || frame->data[3]) { av_log(avctx, AV_LOG_ERROR, "pic->data[*]!=NULL in get_buffer_internal\n"); ret = AVERROR(EINVAL); goto fail; } } else if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) { #if FF_API_OLD_CHANNEL_LAYOUT FF_DISABLE_DEPRECATION_WARNINGS /* compat layer for old-style get_buffer() implementations */ avctx->channels = avctx->ch_layout.nb_channels; avctx->channel_layout = (avctx->ch_layout.order == AV_CHANNEL_ORDER_NATIVE) ? avctx->ch_layout.u.mask : 0; FF_ENABLE_DEPRECATION_WARNINGS #endif if (frame->nb_samples * (int64_t)avctx->ch_layout.nb_channels > avctx->max_samples) { av_log(avctx, AV_LOG_ERROR, "samples per frame %d, exceeds max_samples %"PRId64"\n", frame->nb_samples, avctx->max_samples); ret = AVERROR(EINVAL); goto fail; } } ret = ff_decode_frame_props(avctx, frame); if (ret < 0) goto fail; if (hwaccel) { if (hwaccel->alloc_frame) { ret = hwaccel->alloc_frame(avctx, frame); goto end; } } else avctx->sw_pix_fmt = avctx->pix_fmt; ret = avctx->get_buffer2(avctx, frame, flags); if (ret < 0) goto fail; validate_avframe_allocation(avctx, frame); ret = ff_attach_decode_data(frame); if (ret < 0) goto fail; end: if (avctx->codec_type == AVMEDIA_TYPE_VIDEO && !override_dimensions && !(ffcodec(avctx->codec)->caps_internal & FF_CODEC_CAP_EXPORTS_CROPPING)) { frame->width = avctx->width; frame->height = avctx->height; } fail: if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); av_frame_unref(frame); } return ret; } static int reget_buffer_internal(AVCodecContext *avctx, AVFrame *frame, int flags) { AVFrame *tmp; int ret; av_assert0(avctx->codec_type == AVMEDIA_TYPE_VIDEO); if (frame->data[0] && (frame->width != avctx->width || frame->height != avctx->height || frame->format != avctx->pix_fmt)) { av_log(avctx, AV_LOG_WARNING, "Picture changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s in reget buffer()\n", frame->width, frame->height, av_get_pix_fmt_name(frame->format), avctx->width, avctx->height, av_get_pix_fmt_name(avctx->pix_fmt)); av_frame_unref(frame); } if (!frame->data[0]) return ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF); if ((flags & FF_REGET_BUFFER_FLAG_READONLY) || av_frame_is_writable(frame)) return ff_decode_frame_props(avctx, frame); tmp = av_frame_alloc(); if (!tmp) return AVERROR(ENOMEM); av_frame_move_ref(tmp, frame); ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF); if (ret < 0) { av_frame_free(&tmp); return ret; } av_frame_copy(frame, tmp); av_frame_free(&tmp); return 0; } int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame, int flags) { int ret = reget_buffer_internal(avctx, frame, flags); if (ret < 0) av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n"); return ret; } int ff_decode_preinit(AVCodecContext *avctx) { AVCodecInternal *avci = avctx->internal; int ret = 0; /* if the decoder init function was already called previously, * free the already allocated subtitle_header before overwriting it */ av_freep(&avctx->subtitle_header); if (avctx->codec->max_lowres < avctx->lowres || avctx->lowres < 0) { av_log(avctx, AV_LOG_WARNING, "The maximum value for lowres supported by the decoder is %d\n", avctx->codec->max_lowres); avctx->lowres = avctx->codec->max_lowres; } if (avctx->sub_charenc) { if (avctx->codec_type != AVMEDIA_TYPE_SUBTITLE) { av_log(avctx, AV_LOG_ERROR, "Character encoding is only " "supported with subtitles codecs\n"); return AVERROR(EINVAL); } else if (avctx->codec_descriptor->props & AV_CODEC_PROP_BITMAP_SUB) { av_log(avctx, AV_LOG_WARNING, "Codec '%s' is bitmap-based, " "subtitles character encoding will be ignored\n", avctx->codec_descriptor->name); avctx->sub_charenc_mode = FF_SUB_CHARENC_MODE_DO_NOTHING; } else { /* input character encoding is set for a text based subtitle * codec at this point */ if (avctx->sub_charenc_mode == FF_SUB_CHARENC_MODE_AUTOMATIC) avctx->sub_charenc_mode = FF_SUB_CHARENC_MODE_PRE_DECODER; if (avctx->sub_charenc_mode == FF_SUB_CHARENC_MODE_PRE_DECODER) { #if CONFIG_ICONV iconv_t cd = iconv_open("UTF-8", avctx->sub_charenc); if (cd == (iconv_t)-1) { ret = AVERROR(errno); av_log(avctx, AV_LOG_ERROR, "Unable to open iconv context " "with input character encoding \"%s\"\n", avctx->sub_charenc); return ret; } iconv_close(cd); #else av_log(avctx, AV_LOG_ERROR, "Character encoding subtitles " "conversion needs a libavcodec built with iconv support " "for this codec\n"); return AVERROR(ENOSYS); #endif } } } avctx->pts_correction_num_faulty_pts = avctx->pts_correction_num_faulty_dts = 0; avctx->pts_correction_last_pts = avctx->pts_correction_last_dts = INT64_MIN; if ( !CONFIG_GRAY && avctx->flags & AV_CODEC_FLAG_GRAY && avctx->codec_descriptor->type == AVMEDIA_TYPE_VIDEO) av_log(avctx, AV_LOG_WARNING, "gray decoding requested but not enabled at configuration time\n"); if (avctx->flags2 & AV_CODEC_FLAG2_EXPORT_MVS) { avctx->export_side_data |= AV_CODEC_EXPORT_DATA_MVS; } avci->in_pkt = av_packet_alloc(); avci->last_pkt_props = av_packet_alloc(); if (!avci->in_pkt || !avci->last_pkt_props) return AVERROR(ENOMEM); ret = decode_bsfs_init(avctx); if (ret < 0) return ret; #if FF_API_DROPCHANGED if (avctx->flags & AV_CODEC_FLAG_DROPCHANGED) av_log(avctx, AV_LOG_WARNING, "The dropchanged flag is deprecated.\n"); #endif return 0; } int ff_copy_palette(void *dst, const AVPacket *src, void *logctx) { size_t size; const void *pal = av_packet_get_side_data(src, AV_PKT_DATA_PALETTE, &size); if (pal && size == AVPALETTE_SIZE) { memcpy(dst, pal, AVPALETTE_SIZE); return 1; } else if (pal) { av_log(logctx, AV_LOG_ERROR, "Palette size %"SIZE_SPECIFIER" is wrong\n", size); } return 0; } AVBufferRef *ff_hwaccel_frame_priv_alloc(AVCodecContext *avctx, const AVHWAccel *hwaccel) { AVBufferRef *ref; AVHWFramesContext *frames_ctx = (AVHWFramesContext *)avctx->hw_frames_ctx->data; uint8_t *data = av_mallocz(hwaccel->frame_priv_data_size); if (!data) return NULL; ref = av_buffer_create(data, hwaccel->frame_priv_data_size, hwaccel->free_frame_priv, frames_ctx->device_ctx, 0); if (!ref) { av_free(data); return NULL; } return ref; } void ff_decode_flush_buffers(AVCodecContext *avctx) { AVCodecInternal *avci = avctx->internal; DecodeContext *dc = decode_ctx(avci); av_packet_unref(avci->last_pkt_props); av_packet_unref(avci->in_pkt); avctx->pts_correction_last_pts = avctx->pts_correction_last_dts = INT64_MIN; av_bsf_flush(avci->bsf); dc->nb_draining_errors = 0; dc->draining_started = 0; } AVCodecInternal *ff_decode_internal_alloc(void) { return av_mallocz(sizeof(DecodeContext)); }