* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include "bytestream.h"
#include "get_bits.h"
#include "golomb.h"
#include "h264.h"
int ff_h264_pred_weight_table(GetBitContext *gb, const SPS *sps,
const int *ref_count, int slice_type_nos,
- H264PredWeightTable *pwt)
+ H264PredWeightTable *pwt, void *logctx)
{
int list, i;
int luma_def, chroma_def;
pwt->chroma_log2_weight_denom = get_ue_golomb(gb);
if (pwt->luma_log2_weight_denom > 7U) {
- av_log(NULL, AV_LOG_ERROR, "luma_log2_weight_denom %d is out of range\n", pwt->luma_log2_weight_denom);
+ av_log(logctx, AV_LOG_ERROR, "luma_log2_weight_denom %d is out of range\n", pwt->luma_log2_weight_denom);
pwt->luma_log2_weight_denom = 0;
}
if (pwt->chroma_log2_weight_denom > 7U) {
- av_log(NULL, AV_LOG_ERROR, "chroma_log2_weight_denom %d is out of range\n", pwt->chroma_log2_weight_denom);
+ av_log(logctx, AV_LOG_ERROR, "chroma_log2_weight_denom %d is out of range\n", pwt->chroma_log2_weight_denom);
pwt->chroma_log2_weight_denom = 0;
}
int status = top[pred_mode_cache[scan8[0] + i]];
if (status < 0) {
av_log(logctx, AV_LOG_ERROR,
- "top block unavailable for requested intra mode %d\n",
+ "top block unavailable for requested intra mode %d\n",
status);
return AVERROR_INVALIDDATA;
} else if (status) {
ref_count[0] - 1, max[0], ref_count[1] - 1, max[1]);
ref_count[0] = ref_count[1] = 0;
*plist_count = 0;
- return AVERROR_INVALIDDATA;
+ goto fail;
}
if (slice_type_nos == AV_PICTURE_TYPE_B)
*plist_count = list_count;
return 0;
+fail:
+ *plist_count = 0;
+ ref_count[0] = 0;
+ ref_count[1] = 0;
+ return AVERROR_INVALIDDATA;
+}
+
+int ff_h264_init_poc(int pic_field_poc[2], int *pic_poc,
+ const SPS *sps, H264POCContext *pc,
+ int picture_structure, int nal_ref_idc)
+{
+ const int max_frame_num = 1 << sps->log2_max_frame_num;
+ int field_poc[2];
+
+ pc->frame_num_offset = pc->prev_frame_num_offset;
+ if (pc->frame_num < pc->prev_frame_num)
+ pc->frame_num_offset += max_frame_num;
+
+ if (sps->poc_type == 0) {
+ const int max_poc_lsb = 1 << sps->log2_max_poc_lsb;
+
+ if (pc->poc_lsb < pc->prev_poc_lsb &&
+ pc->prev_poc_lsb - pc->poc_lsb >= max_poc_lsb / 2)
+ pc->poc_msb = pc->prev_poc_msb + max_poc_lsb;
+ else if (pc->poc_lsb > pc->prev_poc_lsb &&
+ pc->prev_poc_lsb - pc->poc_lsb < -max_poc_lsb / 2)
+ pc->poc_msb = pc->prev_poc_msb - max_poc_lsb;
+ else
+ pc->poc_msb = pc->prev_poc_msb;
+ field_poc[0] =
+ field_poc[1] = pc->poc_msb + pc->poc_lsb;
+ if (picture_structure == PICT_FRAME)
+ field_poc[1] += pc->delta_poc_bottom;
+ } else if (sps->poc_type == 1) {
+ int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
+ int i;
+
+ if (sps->poc_cycle_length != 0)
+ abs_frame_num = pc->frame_num_offset + pc->frame_num;
+ else
+ abs_frame_num = 0;
+
+ if (nal_ref_idc == 0 && abs_frame_num > 0)
+ abs_frame_num--;
+
+ expected_delta_per_poc_cycle = 0;
+ for (i = 0; i < sps->poc_cycle_length; i++)
+ // FIXME integrate during sps parse
+ expected_delta_per_poc_cycle += sps->offset_for_ref_frame[i];
+
+ if (abs_frame_num > 0) {
+ int poc_cycle_cnt = (abs_frame_num - 1) / sps->poc_cycle_length;
+ int frame_num_in_poc_cycle = (abs_frame_num - 1) % sps->poc_cycle_length;
+
+ expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
+ for (i = 0; i <= frame_num_in_poc_cycle; i++)
+ expectedpoc = expectedpoc + sps->offset_for_ref_frame[i];
+ } else
+ expectedpoc = 0;
+
+ if (nal_ref_idc == 0)
+ expectedpoc = expectedpoc + sps->offset_for_non_ref_pic;
+
+ field_poc[0] = expectedpoc + pc->delta_poc[0];
+ field_poc[1] = field_poc[0] + sps->offset_for_top_to_bottom_field;
+
+ if (picture_structure == PICT_FRAME)
+ field_poc[1] += pc->delta_poc[1];
+ } else {
+ int poc = 2 * (pc->frame_num_offset + pc->frame_num);
+
+ if (!nal_ref_idc)
+ poc--;
+
+ field_poc[0] = poc;
+ field_poc[1] = poc;
+ }
+
+ if (picture_structure != PICT_BOTTOM_FIELD)
+ pic_field_poc[0] = field_poc[0];
+ if (picture_structure != PICT_TOP_FIELD)
+ pic_field_poc[1] = field_poc[1];
+ *pic_poc = FFMIN(pic_field_poc[0], pic_field_poc[1]);
+
+ return 0;
+}
+
+static int decode_extradata_ps(const uint8_t *data, int size, H264ParamSets *ps,
+ int is_avc, void *logctx)
+{
+ H2645Packet pkt = { 0 };
+ int i, ret = 0;
+
+ ret = ff_h2645_packet_split(&pkt, data, size, logctx, is_avc, 2, AV_CODEC_ID_H264);
+ if (ret < 0) {
+ ret = 0;
+ goto fail;
+ }
+
+ for (i = 0; i < pkt.nb_nals; i++) {
+ H2645NAL *nal = &pkt.nals[i];
+ switch (nal->type) {
+ case NAL_SPS:
+ ret = ff_h264_decode_seq_parameter_set(&nal->gb, logctx, ps, 0);
+ if (ret < 0)
+ goto fail;
+ break;
+ case NAL_PPS:
+ ret = ff_h264_decode_picture_parameter_set(&nal->gb, logctx, ps,
+ nal->size_bits);
+ if (ret < 0)
+ goto fail;
+ break;
+ default:
+ av_log(logctx, AV_LOG_VERBOSE, "Ignoring NAL type %d in extradata\n",
+ nal->type);
+ break;
+ }
+ }
+
+fail:
+ ff_h2645_packet_uninit(&pkt);
+ return ret;
+}
+
+/* There are (invalid) samples in the wild with mp4-style extradata, where the
+ * parameter sets are stored unescaped (i.e. as RBSP).
+ * This function catches the parameter set decoding failure and tries again
+ * after escaping it */
+static int decode_extradata_ps_mp4(const uint8_t *buf, int buf_size, H264ParamSets *ps,
+ int err_recognition, void *logctx)
+{
+ int ret;
+
+ ret = decode_extradata_ps(buf, buf_size, ps, 1, logctx);
+ if (ret < 0 && !(err_recognition & AV_EF_EXPLODE)) {
+ GetByteContext gbc;
+ PutByteContext pbc;
+ uint8_t *escaped_buf;
+ int escaped_buf_size;
+
+ av_log(logctx, AV_LOG_WARNING,
+ "SPS decoding failure, trying again after escaping the NAL\n");
+
+ if (buf_size / 2 >= (INT16_MAX - AV_INPUT_BUFFER_PADDING_SIZE) / 3)
+ return AVERROR(ERANGE);
+ escaped_buf_size = buf_size * 3 / 2 + AV_INPUT_BUFFER_PADDING_SIZE;
+ escaped_buf = av_mallocz(escaped_buf_size);
+ if (!escaped_buf)
+ return AVERROR(ENOMEM);
+
+ bytestream2_init(&gbc, buf, buf_size);
+ bytestream2_init_writer(&pbc, escaped_buf, escaped_buf_size);
+
+ while (bytestream2_get_bytes_left(&gbc)) {
+ if (bytestream2_get_bytes_left(&gbc) >= 3 &&
+ bytestream2_peek_be24(&gbc) <= 3) {
+ bytestream2_put_be24(&pbc, 3);
+ bytestream2_skip(&gbc, 2);
+ } else
+ bytestream2_put_byte(&pbc, bytestream2_get_byte(&gbc));
+ }
+
+ escaped_buf_size = bytestream2_tell_p(&pbc);
+ AV_WB16(escaped_buf, escaped_buf_size - 2);
+
+ ret = decode_extradata_ps(escaped_buf, escaped_buf_size, ps, 1, logctx);
+ av_freep(&escaped_buf);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+int ff_h264_decode_extradata(const uint8_t *data, int size, H264ParamSets *ps,
+ int *is_avc, int *nal_length_size,
+ int err_recognition, void *logctx)
+{
+ int ret;
+
+ if (!data || size <= 0)
+ return -1;
+
+ if (data[0] == 1) {
+ int i, cnt, nalsize;
+ const uint8_t *p = data;
+
+ *is_avc = 1;
+
+ if (size < 7) {
+ av_log(logctx, AV_LOG_ERROR, "avcC %d too short\n", size);
+ return AVERROR_INVALIDDATA;
+ }
+
+ // Decode sps from avcC
+ cnt = *(p + 5) & 0x1f; // Number of sps
+ p += 6;
+ for (i = 0; i < cnt; i++) {
+ nalsize = AV_RB16(p) + 2;
+ if (nalsize > size - (p - data))
+ return AVERROR_INVALIDDATA;
+ ret = decode_extradata_ps_mp4(p, nalsize, ps, err_recognition, logctx);
+ if (ret < 0) {
+ av_log(logctx, AV_LOG_ERROR,
+ "Decoding sps %d from avcC failed\n", i);
+ return ret;
+ }
+ p += nalsize;
+ }
+ // Decode pps from avcC
+ cnt = *(p++); // Number of pps
+ for (i = 0; i < cnt; i++) {
+ nalsize = AV_RB16(p) + 2;
+ if (nalsize > size - (p - data))
+ return AVERROR_INVALIDDATA;
+ ret = decode_extradata_ps_mp4(p, nalsize, ps, err_recognition, logctx);
+ if (ret < 0) {
+ av_log(logctx, AV_LOG_ERROR,
+ "Decoding pps %d from avcC failed\n", i);
+ return ret;
+ }
+ p += nalsize;
+ }
+ // Store right nal length size that will be used to parse all other nals
+ *nal_length_size = (data[4] & 0x03) + 1;
+ } else {
+ *is_avc = 0;
+ ret = decode_extradata_ps(data, size, ps, 0, logctx);
+ if (ret < 0)
+ return ret;
+ }
+ return size;
+}
+
+/**
+ * Compute profile from profile_idc and constraint_set?_flags.
+ *
+ * @param sps SPS
+ *
+ * @return profile as defined by FF_PROFILE_H264_*
+ */
+int ff_h264_get_profile(const SPS *sps)
+{
+ int profile = sps->profile_idc;
+
+ switch (sps->profile_idc) {
+ case FF_PROFILE_H264_BASELINE:
+ // constraint_set1_flag set to 1
+ profile |= (sps->constraint_set_flags & 1 << 1) ? FF_PROFILE_H264_CONSTRAINED : 0;
+ break;
+ case FF_PROFILE_H264_HIGH_10:
+ case FF_PROFILE_H264_HIGH_422:
+ case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
+ // constraint_set3_flag set to 1
+ profile |= (sps->constraint_set_flags & 1 << 3) ? FF_PROFILE_H264_INTRA : 0;
+ break;
+ }
+
+ return profile;
}
projects / ffmpeg / blobdiff