diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c index d63640345b..9403d72f2f 100644 --- a/libavcodec/pngdec.c +++ b/libavcodec/pngdec.c @@ -75,6 +75,7 @@ typedef struct PNGDecContext { int have_chrm; uint32_t white_point[2]; uint32_t display_primaries[3][2]; + int gamma; int have_srgb; int have_cicp; enum AVColorPrimaries cicp_primaries; @@ -641,6 +642,83 @@ static int decode_phys_chunk(AVCodecContext *avctx, PNGDecContext *s, return 0; } +/* + * This populates AVCodecContext fields so it must be called before + * ff_thread_finish_setup() to avoid a race condition with respect to the + * generic copying of avctx fields. + */ +static int populate_avctx_color_fields(AVCodecContext *avctx, AVFrame *frame) +{ + PNGDecContext *s = avctx->priv_data; + + if (s->have_cicp) { + if (s->cicp_primaries >= AVCOL_PRI_NB) + av_log(avctx, AV_LOG_WARNING, "unrecognized cICP primaries\n"); + else + avctx->color_primaries = frame->color_primaries = s->cicp_primaries; + if (s->cicp_trc >= AVCOL_TRC_NB) + av_log(avctx, AV_LOG_WARNING, "unrecognized cICP transfer\n"); + else + avctx->color_trc = frame->color_trc = s->cicp_trc; + if (s->cicp_range == 0) + av_log(avctx, AV_LOG_WARNING, "unsupported tv-range cICP chunk\n"); + } else if (s->iccp_data) { + AVFrameSideData *sd = av_frame_new_side_data(frame, AV_FRAME_DATA_ICC_PROFILE, s->iccp_data_len); + if (!sd) + return AVERROR(ENOMEM); + memcpy(sd->data, s->iccp_data, s->iccp_data_len); + av_dict_set(&sd->metadata, "name", s->iccp_name, 0); + } else if (s->have_srgb) { + avctx->color_primaries = frame->color_primaries = AVCOL_PRI_BT709; + avctx->color_trc = frame->color_trc = AVCOL_TRC_IEC61966_2_1; + } else if (s->have_chrm) { + AVColorPrimariesDesc desc; + enum AVColorPrimaries prim; + desc.wp.x = av_make_q(s->white_point[0], 100000); + desc.wp.y = av_make_q(s->white_point[1], 100000); + desc.prim.r.x = av_make_q(s->display_primaries[0][0], 100000); + desc.prim.r.y = av_make_q(s->display_primaries[0][1], 100000); + desc.prim.g.x = av_make_q(s->display_primaries[1][0], 100000); + desc.prim.g.y = av_make_q(s->display_primaries[1][1], 100000); + desc.prim.b.x = av_make_q(s->display_primaries[2][0], 100000); + desc.prim.b.y = av_make_q(s->display_primaries[2][1], 100000); + prim = av_csp_primaries_id_from_desc(&desc); + if (prim != AVCOL_PRI_UNSPECIFIED) + avctx->color_primaries = frame->color_primaries = prim; + else + av_log(avctx, AV_LOG_WARNING, "unknown cHRM primaries\n"); + } + + /* these chunks override gAMA */ + if (s->iccp_data || s->have_srgb || s->have_cicp) { + av_dict_set(&s->frame_metadata, "gamma", NULL, 0); + } else if (s->gamma) { + /* + * These values are 100000/2.2, 100000/2.8, 100000/2.6, and + * 100000/1.0 respectively. 45455, 35714, and 38462, and 100000. + * There's a 0.001 gamma tolerance here in case of floating + * point issues when the PNG was written. + * + * None of the other enums have a pure gamma curve so it makes + * sense to leave those to sRGB and cICP. + */ + if (s->gamma > 45355 && s->gamma < 45555) + avctx->color_trc = frame->color_trc = AVCOL_TRC_GAMMA22; + else if (s->gamma > 35614 && s->gamma < 35814) + avctx->color_trc = frame->color_trc = AVCOL_TRC_GAMMA28; + else if (s->gamma > 38362 && s->gamma < 38562) + avctx->color_trc = frame->color_trc = AVCOL_TRC_SMPTE428; + else if (s->gamma > 99900 && s->gamma < 100100) + avctx->color_trc = frame->color_trc = AVCOL_TRC_LINEAR; + } + + /* we only support pc-range RGB */ + avctx->colorspace = frame->colorspace = AVCOL_SPC_RGB; + avctx->color_range = frame->color_range = AVCOL_RANGE_JPEG; + + return 0; +} + static int decode_idat_chunk(AVCodecContext *avctx, PNGDecContext *s, GetByteContext *gb, AVFrame *p) { @@ -756,6 +834,8 @@ static int decode_idat_chunk(AVCodecContext *avctx, PNGDecContext *s, p->key_frame = 1; p->interlaced_frame = !!s->interlace_type; + if ((ret = populate_avctx_color_fields(avctx, p)) < 0) + return ret; ff_thread_finish_setup(avctx); /* compute the compressed row size */ @@ -1257,6 +1337,10 @@ static int decode_frame_common(AVCodecContext *avctx, PNGDecContext *s, case MKTAG('t', 'E', 'X', 't'): case MKTAG('I', 'D', 'A', 'T'): case MKTAG('t', 'R', 'N', 'S'): + case MKTAG('s', 'R', 'G', 'B'): + case MKTAG('c', 'I', 'C', 'P'): + case MKTAG('c', 'H', 'R', 'M'): + case MKTAG('g', 'A', 'M', 'A'): break; default: continue; @@ -1359,10 +1443,10 @@ static int decode_frame_common(AVCodecContext *avctx, PNGDecContext *s, case MKTAG('g', 'A', 'M', 'A'): { AVBPrint bp; char *gamma_str; - int num = bytestream2_get_be32(&gb_chunk); + s->gamma = bytestream2_get_be32(&gb_chunk); av_bprint_init(&bp, 0, AV_BPRINT_SIZE_UNLIMITED); - av_bprintf(&bp, "%i/%i", num, 100000); + av_bprintf(&bp, "%i/%i", s->gamma, 100000); ret = av_bprint_finalize(&bp, &gamma_str); if (ret < 0) return ret; @@ -1500,56 +1584,8 @@ static void clear_frame_metadata(PNGDecContext *s) static int output_frame(PNGDecContext *s, AVFrame *f) { - AVCodecContext *avctx = s->avctx; int ret; - if (s->have_cicp) { - if (s->cicp_primaries >= AVCOL_PRI_NB) - av_log(avctx, AV_LOG_WARNING, "unrecognized cICP primaries\n"); - else - avctx->color_primaries = f->color_primaries = s->cicp_primaries; - if (s->cicp_trc >= AVCOL_TRC_NB) - av_log(avctx, AV_LOG_WARNING, "unrecognized cICP transfer\n"); - else - avctx->color_trc = f->color_trc = s->cicp_trc; - avctx->color_range = f->color_range = - s->cicp_range == 0 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG; - } else if (s->iccp_data) { - AVFrameSideData *sd = av_frame_new_side_data(f, AV_FRAME_DATA_ICC_PROFILE, s->iccp_data_len); - if (!sd) { - ret = AVERROR(ENOMEM); - goto fail; - } - memcpy(sd->data, s->iccp_data, s->iccp_data_len); - - av_dict_set(&sd->metadata, "name", s->iccp_name, 0); - } else if (s->have_srgb) { - avctx->color_primaries = f->color_primaries = AVCOL_PRI_BT709; - avctx->color_trc = f->color_trc = AVCOL_TRC_IEC61966_2_1; - } else if (s->have_chrm) { - AVColorPrimariesDesc desc; - enum AVColorPrimaries prim; - desc.wp.x = av_make_q(s->white_point[0], 100000); - desc.wp.y = av_make_q(s->white_point[1], 100000); - desc.prim.r.x = av_make_q(s->display_primaries[0][0], 100000); - desc.prim.r.y = av_make_q(s->display_primaries[0][1], 100000); - desc.prim.g.x = av_make_q(s->display_primaries[1][0], 100000); - desc.prim.g.y = av_make_q(s->display_primaries[1][1], 100000); - desc.prim.b.x = av_make_q(s->display_primaries[2][0], 100000); - desc.prim.b.y = av_make_q(s->display_primaries[2][1], 100000); - prim = av_csp_primaries_id_from_desc(&desc); - if (prim != AVCOL_PRI_UNSPECIFIED) - avctx->color_primaries = f->color_primaries = prim; - else - av_log(avctx, AV_LOG_WARNING, "unknown cHRM primaries\n"); - } - - /* these chunks override gAMA */ - if (s->iccp_data || s->have_srgb || s->have_cicp) - av_dict_set(&s->frame_metadata, "gamma", NULL, 0); - - avctx->colorspace = f->colorspace = AVCOL_SPC_RGB; - if (s->stereo_mode >= 0) { AVStereo3D *stereo3d = av_stereo3d_create_side_data(f); if (!stereo3d) { diff --git a/tests/ref/fate/png-icc b/tests/ref/fate/png-icc index 14de544639..1f4eab1fb0 100644 --- a/tests/ref/fate/png-icc +++ b/tests/ref/fate/png-icc @@ -1,5 +1,5 @@ -a50d37a0e72bddea2fcbba6fb773e2a0 *tests/data/fate/png-icc.image2 -49397 tests/data/fate/png-icc.image2 +c460cd06a88ace94d7c76a6309aa8fb8 *tests/data/fate/png-icc.image2 +49441 tests/data/fate/png-icc.image2 #tb 0: 1/25 #media_type 0: video #codec_id 0: rawvideo @@ -21,7 +21,7 @@ pkt_duration_time=0.040000 duration=1 duration_time=0.040000 pkt_pos=0 -pkt_size=49397 +pkt_size=49441 width=128 height=128 pix_fmt=rgb24 @@ -34,7 +34,7 @@ top_field_first=0 repeat_pict=0 color_range=pc color_space=gbr -color_primaries=unknown +color_primaries=bt709 color_transfer=unknown chroma_location=unspecified [SIDE_DATA] diff --git a/tests/ref/fate/png-side-data b/tests/ref/fate/png-side-data index a4c16eb395..8f955f76bc 100644 --- a/tests/ref/fate/png-side-data +++ b/tests/ref/fate/png-side-data @@ -26,7 +26,7 @@ top_field_first=0 repeat_pict=0 color_range=pc color_space=gbr -color_primaries=unknown +color_primaries=bt709 color_transfer=unknown chroma_location=unspecified [SIDE_DATA]